typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } catch {
        throw ParsingError.internalError(error)
    }
}

func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } catch {
        return nil
    }
}

func parse(string: String, defaultValue: JSON) -> JSON {
    guard let data = string.data(using: .utf8) else {
        return defaultValue
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? defaultValue
    } catch {
        return defaultValue
    }
}

func parse(string: String, defaultValue: JSON) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        return defaultValue
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? defaultValue
    } catch {
        throw ParsingError.internalError(error)
    }
}

func parse(string: String, defaultValue: JSON) -> Result<JSON, Error> {
    guard let data = string.data(using: .utf8) else {
        return .failure(ParsingError.invalidInput)
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return .success(json ?? defaultValue)
    } catch {
        return .failure(ParsingError.internalError(error))
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } catch {
        return nil
    }
}

// JSON parser, returns a default value in case of failures.
func parse(string: String, defaultValue: JSON) -> JSON {
    guard let data = string.data(using: .utf8) else {
        return defaultValue
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? defaultValue
    } catch {
        return defaultValue
    }
}

// JSON parser, returns a default value in case of failures.
func parse(string: String, defaultValue: JSON) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        return defaultValue
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? defaultValue
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns a default value in case of failures.
func parse(string: String, defaultValue: JSON) -> Result<JSON, Error> {
    guard let data = string.data(using: .utf8) else {
        return .failure(ParsingError.invalidInput)
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return .success(json ?? defaultValue)
    } catch {
        return .failure(ParsingError.internalError(error))
    }
}

// JSON parser, returns a default value in case of failures.
func parse(string: String, defaultValue: JSON) -> Result<JSON, Error> {
    guard let data = string.data(using: .utf8) else {
        return .failure(ParsingError.invalidInput)
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return .success(json ?? defaultValue)
    } catch {
        return .failure(ParsingError.internalError(error))
    }
}

// JSON parser, returns a default value in case of failures.
func parse(string: String, defaultValue: JSON) -> Result<JSON, Error> {
    guard let data = string.data(using: .utf8) else {
        return .failure(ParsingError.invalidInput)
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return .success(json ?? defaultValue)
    } catch {
        return .failure(ParsingError.internalError(error))
    }
}

// JSON parser, returns a default value in case of failures.
func parse(string: String, defaultValue: JSON) -> Result<JSON, Error> {
    guard let data = string.data(using: .utf8) else {
        return .failure(ParsingError.invalidInput)
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return .success(json ?? defaultValue)
    } catch {
        return .failure(ParsingError.internalError(error))
    }
}

// JSON parser, returns a default value in case of failures.
func parse(string: String, defaultValue: JSON) -> Result<JSON, Error> {
    guard let data = string.data(using: .utf8) else {
        return .failure(ParsingError.invalidInput)
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return .success(json ?? defaultValue)
    } catch {
        return .failure(ParsingError.internalError(error))
    }
}

// JSON parser, returns a default value in

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            return nil
        }
        return object
    } catch {
        return nil
    }
}

func parse(data: Data) -> JSON? {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            return nil
        }
        return object
    } catch {
        return nil
    }
}

func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            return nil
        }
        return object
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) -> JSON? {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            return nil
        }
        return object
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let json = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return json
    } catch {
        throw ParsingError.internalError(error)
    }
}

func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let json = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return json
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}
```

```swift
// JSON

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let object = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return object
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

func validate(json: JSON) throws {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let _ = try JSONSerialization.jsonObject(with: data, options: [])
    } catch {
        throw ParsingError.internalError(error)
    }
}

func merge(json1: JSON, json2: JSON) throws -> JSON {
    do {
        let data1 = try JSONSerialization.data(withJSONObject: json1, options: [])
        let data2 = try JSONSerialization.data(withJSONObject: json2, options: [])
        let merged = try JSONSerialization.jsonObject(with: data1, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: data2, options: []) as! JSON

        return merged
    } catch {
        throw ParsingError.internalError(error)
    }
}

func diff(json1: JSON, json2: JSON) throws -> JSON {
    do {
        let data1 = try JSONSerialization.data(withJSONObject: json1, options: [])
        let data2 = try JSONSerialization.data(withJSONObject: json2, options: [])
        let diff = try JSONSerialization.jsonObject(with: data1, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: data2, options: []) as! JSON

        return diff
    } catch {
        throw ParsingError.internalError(error)
    }
}

func patch(json: JSON, patch: JSON) throws -> JSON {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let patchData = try JSONSerialization.data(withJSONObject: patch, options: [])
        let patched = try JSONSerialization.jsonObject(with: data, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: patchData, options: []) as! JSON

        return patched
    } catch {
        throw ParsingError.internalError(error)
    }
}

func query(json: JSON, query: String) throws -> JSON {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let queryData = try JSONSerialization.data(withJSONObject: query, options: [])
        let queried = try JSONSerialization.jsonObject(with: data, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: queryData, options: []) as! JSON

        return queried
    } catch {
        throw ParsingError.internalError(error)
    }
}

func transform(json: JSON, transform: JSON) throws -> JSON {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let transformData = try JSONSerialization.data(withJSONObject: transform, options: [])
        let transformed = try JSONSerialization.jsonObject(with: data, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: transformData, options: []) as! JSON

        return transformed
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let _ = try JSONSerialization.jsonObject(with: data, options: [])
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON merger, returns custom error type in case of failures.
func merge(json1: JSON, json2: JSON) throws -> JSON {
    do {
        let data1 = try JSONSerialization.data(withJSONObject: json1, options: [])
        let data2 = try JSONSerialization.data(withJSONObject: json2, options: [])
        let merged = try JSONSerialization.jsonObject(with: data1, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: data2, options: []) as! JSON

        return merged
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON diff, returns custom error type in case of failures.
func diff(json1: JSON, json2: JSON) throws -> JSON {
    do {
        let data1 = try JSONSerialization.data(withJSONObject: json1, options: [])
        let data2 = try JSONSerialization.data(withJSONObject: json2, options: [])
        let diff = try JSONSerialization.jsonObject(with: data1, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: data2, options: []) as! JSON

        return diff
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON patch, returns custom error type in case of failures.
func patch(json: JSON, patch: JSON) throws -> JSON {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let patchData = try JSONSerialization.data(withJSONObject: patch, options: [])
        let patched = try JSONSerialization.jsonObject(with: data, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: patchData, options: []) as! JSON

        return patched
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON query, returns custom error type in case of failures.
func query(json: JSON, query: String) throws -> JSON {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let queryData = try JSONSerialization.data(withJSONObject: query, options: [])
        let queried = try JSONSerialization.jsonObject(with: data, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: queryData, options: []) as! JSON

        return queried
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON transform, returns custom error type in case of failures.
func transform(json: JSON, transform: JSON) throws -> JSON {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        let transformData = try JSONSerialization.data(withJSONObject: transform, options: [])
        let transformed = try JSONSerialization.jsonObject(with: data, options: []) as! JSON
        let _ = try JSONSerialization.jsonObject(with: transformData, options: []) as! JSON

        return transformed
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON validation, returns custom error type in case of failures.
func

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        guard let result = json else {
            throw ParsingError.invalidInput
        }
        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        guard let result = json else {
            throw ParsingError.invalidInput
        }
        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json
    } catch {
        return nil
    }
}

// JSON parser, returns nil in case of failures.
func parse(string: String) -> JSON? {
    guard let data = string.data(using: .utf8) else {
        return nil
    }
    
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(data: data, encoding: .utf8) ?? ""
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        return String(

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let result = json as? JSON else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: json, options: [])
        guard let result = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }

        return result

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " + attributesString : "")>\(childrenString)</\(name)>"
    }
}

func generate(_ tree: HTMLNode, indent: Int = 0) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0, indent: indent + 2) }.joined(separator: "\n")
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

func generate(_ tree: HTMLNode, indent: Int = 0, withAttributes: Bool = true) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = withAttributes ? attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ") : ""
        let childrenString = children.map { generate($0, indent: indent + 2, withAttributes: withAttributes) }.joined(separator: "\n")
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

func generate(_ tree: HTMLNode, indent: Int = 0, withAttributes: Bool = true, withChildren: Bool = true) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = withAttributes ? attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ") : ""
        let childrenString = withChildren ? children.map { generate($0, indent: indent + 2, withAttributes: withAttributes, withChildren: withChildren) }.joined(separator: "\n") : ""
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

func generate(_ tree: HTMLNode, indent: Int = 0, withAttributes: Bool = true, withChildren: Bool = true, withText: Bool = true) -> String {
    switch tree {
    case .text(let content):
        return withText ? content : ""
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = withAttributes ? attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ") : ""
        let childrenString = withChildren ? children.map { generate($0, indent: indent + 2, withAttributes: withAttributes, withChildren: withChildren, withText: withText) }.joined(separator: "\n") : ""
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " + attributesString : "")>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode, indent: Int = 0) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0, indent: indent + 2) }.joined(separator: "\n")
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode, indent: Int = 0, withAttributes: Bool = true) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = withAttributes ? attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ") : ""
        let childrenString = children.map { generate($0, indent: indent + 2, withAttributes: withAttributes) }.joined(separator: "\n")
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode, indent: Int = 0, withAttributes: Bool = true, withChildren: Bool = true) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = withAttributes ? attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ") : ""
        let childrenString = withChildren ? children.map { generate($0, indent: indent + 2, withAttributes: withAttributes, withChildren: withChildren) }.joined(separator: "\n") : ""
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode, indent: Int = 0, withAttributes: Bool = true, withChildren: Bool = true, withText: Bool = true) -> String {
    switch tree {
    case .text(let content):
        return withText ? content : ""
    case .element(let name, let attributes, let children):
        let indentString = String(repeating: " ", count: indent)
        let attributesString = withAttributes ? attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ") : ""
        let childrenString = withChildren ? children.map { generate($0, indent: indent + 2, withAttributes: withAttributes, withChildren: withChildren, withText: withText) }.joined(separator: "\n") : ""
        return "\(indentString)<\(name)\(attributesString ? " " + attributesString : "")>\n\(childrenString)\(indentString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name)\(attributesString ? " " : "")\(attributesString)>\(childrenString)</\(name)>"
    }
}

//

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree:

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree:

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree:

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map { generate($0) }.joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree:

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
        let childrenString = children.map(generate).joined(separator: "")
        return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
    }
}

let tree = HTMLNode.element("div", attributes: ["class": "container"], children: [
    HTMLNode.element("a", attributes: ["href": "swifteval"]),
    HTMLNode.text("Hello, world!")
])

let html = generate(tree)
print(html)
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }

    var stack = [Double]()
    for token in tokens {
        switch token {
        case "+":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a + b)
        case "-":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a - b)
        case "*":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a * b)
        case "/":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a / b)
        default:
            guard let value = Double(token) else {
                throw CalculateError.invalidInput
            }
            stack.append(value)
        }
    }

    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }
    return stack.first!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }

    var stack = [Double]()
    for token in tokens {
        switch token {
        case "+":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a + b)
        case "-":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a - b)
        case "*":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a * b)
        case "/":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a / b)
        default:
            guard let value = Double(token) else {
                throw CalculateError.invalidInput
            }
            stack.append(value)
        }
    }

    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }
    return stack.first!
}

// Test
do {
    let result = try calculate("2+2*2")
    print("Result: \(result)")
} catch {
    print("Error: \(error)")
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack = [Double]()

    for token in tokens {
        switch token {
        case "+":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b + a)
        case "-":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b - a)
        case "*":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b * a)
        case "/":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b / a)
        default:
            guard let number = Double(token) else {
                throw CalculateError.invalidInput
            }
            stack.append(number)
        }
    }

    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }

    return stack.first!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack = [Double]()

    for token in tokens {
        switch token {
        case "+":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b + a)
        case "-":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b - a)
        case "*":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b * a)
        case "/":
            let a = stack.removeLast()
            let b = stack.removeLast()
            stack.append(b / a)
        default:
            guard let number = Double(token) else {
                throw CalculateError.invalidInput
            }
            stack.append(number)
        }
    }

    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }

    return stack.first!
}

// Example input
let input = "2+2*2"
do {
    let result = try calculate(input)
    print(result)
} catch {
    print("Invalid input")
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    for token in tokens {
        switch token {
        case "+":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a + b)
        case "-":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a - b)
        case "*":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a * b)
        case "/":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a / b)
        case "(":
            stack.append(Double(token)!)
        case ")":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a + b)
        default:
            stack.append(Double(token)!)
        }
    }
    
    return stack.popLast()!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    for token in tokens {
        switch token {
        case "+":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a + b)
        case "-":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a - b)
        case "*":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a * b)
        case "/":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a / b)
        case "(":
            stack.append(Double(token)!)
        case ")":
            let b = stack.popLast()!
            let a = stack.popLast()!
            stack.append(a + b)
        default:
            stack.append(Double(token)!)
        }
    }
    
    return stack.popLast()!
}

// Test
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Error: \(error)")
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack: [Double] = []
    
    for token in tokens {
        switch token {
        case "+":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b + a)
        case "-":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b - a)
        case "*":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        case "/":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b / a)
        case "(":
            stack.append(Double(token)!)
        case ")":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        default:
            stack.append(Double(token)!)
        }
    }
    
    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }
    
    return stack.popLast()!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack: [Double] = []
    
    for token in tokens {
        switch token {
        case "+":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b + a)
        case "-":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b - a)
        case "*":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        case "/":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b / a)
        case "(":
            stack.append(Double(token)!)
        case ")":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        default:
            stack.append(Double(token)!)
        }
    }
    
    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }
    
    return stack.popLast()!
}

// Test
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Error: \(error)")
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    let numbers = tokens.compactMap { Double($0) }
    let operators = tokens.compactMap { $0.contains(where: { "+-*/()".contains($0) }) ? String($0) : nil }

    guard numbers.count == operators.count + 1 else {
        throw CalculateError.invalidInput
    }

    var stack = [Double]()
    for (number, operator) in zip(numbers, operators) {
        switch operator {
        case "+":
            stack.append(stack.removeLast() + number)
        case "-":
            stack.append(stack.removeLast() - number)
        case "*":
            stack.append(stack.removeLast() * number)
        case "/":
            stack.append(stack.removeLast() / number)
        case "(":
            stack.append(number)
        case ")":
            stack.append(stack.removeLast())
        default:
            break
        }
    }

    return stack.first ?? 0
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    let numbers = tokens.compactMap { Double($0) }
    let operators = tokens.compactMap { $0.contains(where: { "+-*/()".contains($0) }) ? String($0) : nil }

    guard numbers.count == operators.count + 1 else {
        throw CalculateError.invalidInput
    }

    var stack = [Double]()
    for (number, operator) in zip(numbers, operators) {
        switch operator {
        case "+":
            stack.append(stack.removeLast() + number)
        case "-":
            stack.append(stack.removeLast() - number)
        case "*":
            stack.append(stack.removeLast() * number)
        case "/":
            stack.append(stack.removeLast() / number)
        case "(":
            stack.append(number)
        case ")":
            stack.append(stack.removeLast())
        default:
            break
        }
    }

    return stack.first ?? 0
}

// Test cases
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7*8")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7*8-9")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7*8-9*10")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7*8-9*10+11")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7*8-9*10+11*12")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7*8-9*10+11*12-13")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+3*4-5*6+7*8-9*10+11*12-13*14")
    print(result)
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2-1*2+

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack = [Double]()
    
    for token in tokens {
        switch token {
        case "+":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a + b)
        case "-":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a - b)
        case "*":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a * b)
        case "/":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a / b)
        case "(":
            stack.append(Double(token)!)
        case ")":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a + b)
        default:
            stack.append(Double(token)!)
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack = [Double]()
    
    for token in tokens {
        switch token {
        case "+":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a + b)
        case "-":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a - b)
        case "*":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a * b)
        case "/":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a / b)
        case "(":
            stack.append(Double(token)!)
        case ")":
            let b = stack.removeLast()
            let a = stack.removeLast()
            stack.append(a + b)
        default:
            stack.append(Double(token)!)
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

// Test cases
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Invalid input")
}

do {
    let result = try calculate("2+2*2")

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    
    for token in tokens {
        switch token {
        case "+":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b + a)
        case "-":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b - a)
        case "*":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        case "/":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b / a)
        default:
            guard let value = Double(token) else {
                throw CalculateError.invalidInput
            }
            stack.append(value)
        }
    }
    
    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    
    for token in tokens {
        switch token {
        case "+":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b + a)
        case "-":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b - a)
        case "*":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        case "/":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b / a)
        default:
            guard let value = Double(token) else {
                throw CalculateError.invalidInput
            }
            stack.append(value)
        }
    }
    
    guard stack.count == 1 else {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

// Test
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print(error)
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack: [Double] = []
    var i = 0
    while i < tokens.count {
        let token = tokens[i]
        switch token {
        case "+":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b + a)
        case "-":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b - a)
        case "*":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        case "/":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b / a)
        case "(":
            throw CalculateError.invalidInput
        case ")":
            throw CalculateError.invalidInput
        default:
            if let number = Double(token) {
                stack.append(number)
            } else {
                throw CalculateError.invalidInput
            }
        }
        i += 1
    }
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    return stack.popLast()!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack: [Double] = []
    var i = 0
    while i < tokens.count {
        let token = tokens[i]
        switch token {
        case "+":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b + a)
        case "-":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b - a)
        case "*":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b * a)
        case "/":
            let a = stack.popLast()!
            let b = stack.popLast()!
            stack.append(b / a)
        case "(":
            throw CalculateError.invalidInput
        case ")":
            throw CalculateError.invalidInput
        default:
            if let number = Double(token) {
                stack.append(number)
            } else {
                throw CalculateError.invalidInput
            }
        }
        i += 1
    }
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    return stack.popLast()!
}

// Test
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print(error)
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }

    var stack = [Double]()
    var i = 0
    while i < tokens.count {
        let token = tokens[i]
        if let number = Double(token) {
            stack.append(number)
        } else {
            switch token {
            case "+":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b + a)
            case "-":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b - a)
            case "*":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b * a)
            case "/":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b / a)
            default:
                throw CalculateError.invalidInput
            }
        }
        i += 1
    }
    return stack.removeLast()
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    guard tokens.count > 0 else {
        throw CalculateError.invalidInput
    }

    var stack = [Double]()
    var i = 0
    while i < tokens.count {
        let token = tokens[i]
        if let number = Double(token) {
            stack.append(number)
        } else {
            switch token {
            case "+":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b + a)
            case "-":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b - a)
            case "*":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b * a)
            case "/":
                let a = stack.removeLast()
                let b = stack.removeLast()
                stack.append(b / a)
            default:
                throw CalculateError.invalidInput
            }
        }
        i += 1
    }
    return stack.removeLast()
}

// Test
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print(error)
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = string.split(separator: " ")
    
    // Check if there is any invalid token.
    for token in tokens {
        guard let _ = ["+", "-", "*", "/", "(", ")"].first(where: { $0 == token }) else {
            throw CalculateError.invalidInput
        }
    }
    
    // Calculate the result.
    var result = 0.0
    var stack = [Double]()
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else if let operation = ["+", "-", "*", "/"].first(where: { $0 == token }) {
            guard let a = stack.popLast(), let b = stack.popLast() else {
                throw CalculateError.invalidInput
            }
            
            switch operation {
            case "+":
                stack.append(b + a)
            case "-":
                stack.append(b - a)
            case "*":
                stack.append(b * a)
            case "/":
                stack.append(b / a)
            default:
                throw CalculateError.invalidInput
            }
        } else if token == "(" {
            stack.append(result)
            result = 0.0
        } else if token == ")" {
            guard let a = stack.popLast() else {
                throw CalculateError.invalidInput
            }
            
            result = a
        }
    }
    
    return result
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens = string.split(separator: " ")
    
    // Check if there is any invalid token.
    for token in tokens {
        guard let _ = ["+", "-", "*", "/", "(", ")"].first(where: { $0 == token }) else {
            throw CalculateError.invalidInput
        }
    }
    
    // Calculate the result.
    var result = 0.0
    var stack = [Double]()
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else if let operation = ["+", "-", "*", "/"].first(where: { $0 == token }) {
            guard let a = stack.popLast(), let b = stack.popLast() else {
                throw CalculateError.invalidInput
            }
            
            switch operation {
            case "+":
                stack.append(b + a)
            case "-":
                stack.append(b - a)
            case "*":
                stack.append(b * a)
            case "/":
                stack.append(b / a)
            default:
                throw CalculateError.invalidInput
            }
        } else if token == "(" {
            stack.append(result)
            result = 0.0
        } else if token == ")" {
            guard let a = stack.popLast() else {
                throw CalculateError.invalidInput
            }
            
            result = a
        }
    }
    
    return result
}

// Test cases.
do {
    let result = try calculate("2+2*2")
    print(result) // 6.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2")
    print(result) // 16.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2")
    print(result) // 32.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2")
    print(result) // 64.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2")
    print(result) // 128.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2")
    print(result) // 256.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2*2")
    print(result) // 512.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2*2*2")
    print(result) // 1024.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2*2*2*2")
    print(result) // 2048.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2")
    print(result) // 4096.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2*2")
    print(result) // 8192.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2*2*2")
    print(result) // 16384.0
} catch {
    print(error)
}

do {
    let result = try calculate("2+2*2*2*2*2*2*2*2*2*2*2*

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int, output: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int, output: String, error: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int, output: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int, output: String, error: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], timeout: Int, output: String, error: String, error: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = environment
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer, error: NSErrorPointer) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = env
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = env
    task.currentDirectoryPath = cwd
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(data: input.data(using: .utf8)!)
    task.environment = env
    task.currentDirectoryPath = cwd
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(data: input.data(using: .utf8)!)
    task.standardOutput = Pipe(fileHandleForReading: FileHandle(forReadingAtPath: output)!)
    task.environment = env
    task.currentDirectoryPath = cwd
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = env
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = env
    task.currentDirectoryPath = cwd
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(data: input.data(using: .utf8)!)
    task.environment = env
    task.currentDirectoryPath = cwd
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(data: input.data(using: .utf8)!)
    task.standardOutput = Pipe(fileHandleForReading: FileHandle(forReadingAtPath: output)!)
    task.environment = env
    task.currentDirectoryPath = cwd
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String],

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], workingDirectory: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit(timeout: .seconds(timeout))
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: Int, errorHandler: (String, String) -> Void) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit(timeout: .seconds(timeout))
    
    if task.terminationStatus != 0 {
        errorHandler(output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
    }
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], workingDirectory: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit(timeout: .seconds(timeout))
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: Int, errorHandler: (String, String) -> Void) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.currentDirectoryPath = workingDirectory
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit(timeout: .seconds(timeout))
    
    if task.terminationStatus != 0 {
        errorHandler(output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
    }
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String

func execute(binary: String, arguments: [String]) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.launch()
    process.waitUntilExit()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.environment = env
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.environment = env
    process.currentDirectoryPath = cwd
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, stdin: String) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.standardInput = stdin.data(using: String.Encoding.utf8)!
    process.environment = env
    process.currentDirectoryPath = cwd
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, stdin: String, stdout: String) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.standardInput = stdin.data(using: String.Encoding.utf8)!
    process.standardOutput = stdout.data(using: String.Encoding.utf8)!
    process.environment = env
    process.currentDirectoryPath = cwd
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.launch()
    process.waitUntilExit()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.environment = env
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.environment = env
    process.currentDirectoryPath = cwd
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, stdin: String) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.standardInput = stdin.data(using: String.Encoding.utf8)!
    process.environment = env
    process.currentDirectoryPath = cwd
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], cwd: String, stdin: String, stdout: String) -> (String, String) {
    let pipe = Pipe()
    let process = Process()
    process.launchPath = binary
    process.arguments = arguments
    process.standardOutput = pipe
    process.standardInput = stdin.data(using: String.Encoding.utf8)!
    process.standardOutput = stdout.data(using: String.Encoding.utf8)!
    process.environment = env
    process.currentDirectoryPath = cwd
    process.launch()
    process.waitUntilExit(timeout: timeout)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], environment: [String: String], workingDirectory: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], environment: [String: String], workingDirectory: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

func execute(binary: String, arguments: [String], environment: [String: String], workingDirectory: String, timeout: Int, errorHandler: (String, String) -> Void) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], workingDirectory: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], workingDirectory: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], workingDirectory: String, timeout: Int, errorHandler: (String, String) -> Void) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    task.currentDirectoryPath = workingDirectory
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, String(data: task.standardError!.readDataToEndOfFile(), encoding: String.Encoding.utf8)!)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String: String], workingDirectory: String, timeout: Int, errorHandler: (String, String) -> Void, successHandler: (String, String) -> Void) -> (String, String) {
    let task = Process()
    task.launchPath = binary

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    task.waitUntilExit()
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe()
    task.standardInput!.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    task.waitUntilExit()
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe()
    task.standardInput!.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    task.waitUntilExit()
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe()
    task.standardInput!.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.launch()
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }
    task.terminationHandler = { _ in
        task.kill()
    }
    task.terminationHandler = { _ in
        task.terminate()
    }
    task.terminationHandler = { _ in
        task.interrupt()
    }

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(fileHandleForReading: FileHandle(data: input.data(using: String.Encoding.utf8)!))
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(fileHandleForReading: FileHandle(data: input.data(using: String.Encoding.utf8)!))
    task.launch()
    task.terminationDate = Date(timeIntervalSinceNow: TimeInterval(timeout))
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    task.terminationDate = Date(timeIntervalSinceNow: TimeInterval(timeout))
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(fileHandleForReading: FileHandle(data: input.data(using: String.Encoding.utf8)!))
    task.launch()
    task.terminationDate = Date(timeIntervalSinceNow: TimeInterval(timeout))
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(fileHandleForReading: FileHandle(data: input.data(using: String.Encoding.utf8)!))
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(fileHandleForReading: FileHandle(data: input.data(using: String.Encoding.utf8)!))
    task.launch()
    task.terminationDate = Date(timeIntervalSinceNow: TimeInterval(timeout))
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    task.terminationDate = Date(timeIntervalSinceNow: TimeInterval(timeout))
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(fileHandleForReading: FileHandle(data: input.data(using: String.Encoding.utf8)!))
    task.launch()
    task.terminationDate = Date(timeIntervalSinceNow: TimeInterval(timeout))
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = Pipe(fileHandleForReading: FileHandle(data: input.data(using: String.Encoding.utf8)!))
    task.standardOutput = Pipe(fileHandleForReading: FileHandle(data: output.data(using: String.Encoding.utf8)!))
    task.launch()
    task.terminationDate = Date(timeIntervalSinceNow: TimeInterval(timeout))
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = NSString

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], workingDir: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = workingDir
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], workingDir: String, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = workingDir
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)!
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], workingDir: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = workingDir
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], workingDir: String, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = workingDir
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)!
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String], workingDir: String, stdin: String, stdout: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = workingDir
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)!
    task.standardOutput = stdout.data(using: String.Encoding.utf8)!
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    
    task.waitUntilExit()
    

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], stdin: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, stdin: String, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.environment = env
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = env
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], stdin: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, stdin: String, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardInput = pipe
    task.environment = env
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.environment = env
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], timeout: Int, stdin: String, env:

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // 25 (cached result)
print(memoizedComputation(5))   // 25 (cached result)
print(memoizedComputation(10))  // 100 (cached result)
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5)) // 25 (cached)
print(memoizedComputation(5)) // 25 (cached)
print(memoizedComputation(10)) // 100 (cached)
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // 25 (cached result)
print(memoizedComputation(5))   // 25 (cached result)
print(memoizedComputation(10))  // 100 (new result)
```

In this

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // Calls expensiveComputation and caches the result
print(memoizedComputation(5))   // Returns the cached result without calling expensiveComputation again
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Simulate an expensive computation
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Simulate an expensive computation
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // 25 (computed)
print(memoizedComputation(5))   // 25 (cached)
print(memoizedComputation(10))  // 100 (computed)
print(memoizedComputation(10))  // 100 (cached)
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Simulate an expensive computation
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Simulate an expensive computation
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // Computes and caches the result
print(memoizedComputation(5))   // Returns the cached result
print(memoizedComputation(10))  // Computes and caches the result
print(memoizedComputation(10))  // Returns the cached result
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    print("Computing expensive computation for input: \(input)")
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    print("Computing expensive computation for input: \(input)")
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5)) // "Computing expensive computation for input: 5"
print(memoizedComputation(5)) // No output, since the result is cached
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    print("Computing expensive computation for input: \(input)")
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    print("Computing expensive computation for input: \(input)")
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // Computes and caches the result
print(memoizedComputation(5))   // Retrieves the cached result
print(memoizedComputation(10))  // Computes and caches the result
print(memoizedComputation(10))  // Retrieves the cached result
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // Computes and caches the result
print(memoizedComputation(5))   // Returns the cached result
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return { input in
        if let result = cache[input] {
            return result
        } else {
            let result = function(input)
            cache[input] = result
            return result
        }
    }
}

// Example usage:
func expensiveComputation(input: Int) -> Int {
    // Perform expensive computation here
    return input * input
}

let memoizedComputation = memoize(expensiveComputation)

print(memoizedComputation(5))   // 25 (computed)
print(memoizedComputation(5))   // 25 (cached)
print(memoizedComputation(10))  // 100 (computed)
print(memoizedComputation(10))  // 100 (cached)
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?

    while attempt < attempts {
        attempt += 1

        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }

    if let error = error {
        throw error
    }

    return result!
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?

    while attempt < attempts {
        attempt += 1

        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }

    if let error = error {
        throw error
    }

    return result!
}
```

```swift
// Retry

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var attempt = 0
  var result: Result<T, Error> = .failure(NSError(domain: "Retry", code: 0, userInfo: nil))
  repeat {
    attempt += 1
    result = Result { try task() }
  } while attempt < attempts && result.isFailure
  return try result.get()
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var attempt = 0
  var result: Result<T, Error> = .failure(NSError(domain: "Retry", code: 0, userInfo: nil))
  repeat {
    attempt += 1
    result = Result { try task() }
  } while attempt < attempts && result.isFailure
  return try result.get()
}
```

```swift
// Retry

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    
    if let error = error {
        throw error
    }
    
    return result!
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    
    if let error = error {
        throw error
    }
    
    return result!
}
```

```swift
// Retry

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    if let error = error {
        throw error
    }
    return result!
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    if let error = error {
        throw error
    }
    return result!
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var attempt = 0
  var result: Result<T, Error> = .failure(NSError(domain: "Retry", code: 0, userInfo: nil))
  repeat {
    attempt += 1
    result = Result { try task() }
  } while attempt < attempts && result.isFailure
  return try result.get()
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var attempt = 0
  var result: Result<T, Error> = .failure(NSError(domain: "Retry", code: 0, userInfo: nil))
  repeat {
    attempt += 1
    result = Result { try task() }
  } while attempt < attempts && result.isFailure
  return try result.get()
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attemptsRemaining = attempts
    while true {
        do {
            return try task()
        } catch {
            if attemptsRemaining == 0 {
                throw error
            }
            attemptsRemaining -= 1
        }
    }
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attemptsRemaining = attempts
    while true {
        do {
            return try task()
        } catch {
            if attemptsRemaining == 0 {
                throw error
            }
            attemptsRemaining -= 1
        }
    }
}
```

```swift
// Retry

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    
    if let error = error {
        throw error
    }
    
    return result!
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    
    if let error = error {
        throw error
    }
    
    return result!
}
```

This function

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?

    while attempt < attempts {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }

    guard let result = result else {
        throw error!
    }

    return result
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?

    while attempt < attempts {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }

    guard let result = result else {
        throw error!
    }

    return result
}
```

```swift
// Retry

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var attempt = 0
  while true {
    do {
      return try task()
    } catch {
      attempt += 1
      guard attempt < attempts else {
        throw error
      }
    }
  }
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var attempt = 0
  while true {
    do {
      return try task()
    } catch {
      attempt += 1
      guard attempt < attempts else {
        throw error
      }
    }
  }
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    if let error = error {
        throw error
    }
    return result!
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempt = 0
    var result: T?
    var error: Error?
    repeat {
        attempt += 1
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    } while attempt < attempts
    if let error = error {
        throw error
    }
    return result!
}
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

// Example usage:
let container = DIContainer()

// Register a service
container.register(Service.self) {
    return Service()
}

// Resolve a service
if let service = container.resolve(Service.self) {
    service.doSomething()
}
```

This code

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }

        return factory()
    }
}

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }

        return factory()
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }

        return factory()
    }
}

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }

        return factory()
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

protocol ServiceProtocol {
    func doSomething()
}

class Service: ServiceProtocol {
    private let dependency: DependencyProtocol

    init(dependency: DependencyProtocol) {
        self.dependency = dependency
    }

    func doSomething() {
        dependency.doSomething()
    }
}

protocol DependencyProtocol {
    func doSomething()
}

class Dependency: DependencyProtocol {
    func doSomething() {
        print("Dependency did something")
    }
}

class ServiceFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createService() -> ServiceProtocol {
        guard let dependency = container.resolve(DependencyProtocol.self) else {
            fatalError("Dependency not found")
        }
        return Service(dependency: dependency)
    }
}

class DependencyFactory {
    func createDependency() -> DependencyProtocol {
        return Dependency()
    }
}

class DIContainerFactory {
    func createContainer() -> DIContainerProtocol {
        let container = DIContainer()
        container.register(DependencyProtocol.self) {
            DependencyFactory().createDependency()
        }
        return container
    }
}

class ServiceFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactory() -> ServiceFactory {
        return ServiceFactory(container: container)
    }
}

class ServiceFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactory() -> ServiceFactoryFactory {
        return ServiceFactoryFactory(container: container)
    }
}

class ServiceFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactory() -> ServiceFactoryFactoryFactory {
        return ServiceFactoryFactoryFactory(container: container)
    }
}

class ServiceFactoryFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactoryFactory() -> ServiceFactoryFactoryFactoryFactory {
        return ServiceFactoryFactoryFactoryFactory(container: container)
    }
}

class ServiceFactoryFactoryFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactoryFactoryFactory() -> ServiceFactoryFactoryFactoryFactoryFactory {
        return ServiceFactoryFactoryFactoryFactoryFactory(container: container)
    }
}

class ServiceFactoryFactoryFactoryFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactoryFactoryFactoryFactory() -> ServiceFactoryFactoryFactoryFactoryFactoryFactory {
        return ServiceFactoryFactoryFactoryFactoryFactoryFactory(container: container)
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

// A simple service that depends on a dependency.
protocol ServiceProtocol {
    func doSomething()
}

class Service: ServiceProtocol {
    private let dependency: DependencyProtocol

    init(dependency: DependencyProtocol) {
        self.dependency = dependency
    }

    func doSomething() {
        dependency.doSomething()
    }
}

// A simple dependency that needs to be injected.
protocol DependencyProtocol {
    func doSomething()
}

class Dependency: DependencyProtocol {
    func doSomething() {
        print("Dependency did something")
    }
}

// A simple factory that creates instances of Service.
class ServiceFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createService() -> ServiceProtocol {
        guard let dependency = container.resolve(DependencyProtocol.self) else {
            fatalError("Dependency not found")
        }
        return Service(dependency: dependency)
    }
}

// A simple factory that creates instances of Dependency.
class DependencyFactory {
    func createDependency() -> DependencyProtocol {
        return Dependency()
    }
}

// A simple factory that creates instances of DIContainer.
class DIContainerFactory {
    func createContainer() -> DIContainerProtocol {
        let container = DIContainer()
        container.register(DependencyProtocol.self) {
            DependencyFactory().createDependency()
        }
        return container
    }
}

// A simple factory that creates instances of ServiceFactory.
class ServiceFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactory() -> ServiceFactory {
        return ServiceFactory(container: container)
    }
}

// A simple factory that creates instances of ServiceFactoryFactory.
class ServiceFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactory() -> ServiceFactoryFactory {
        return ServiceFactoryFactory(container: container)
    }
}

// A simple factory that creates instances of ServiceFactoryFactoryFactory.
class ServiceFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactory() -> ServiceFactoryFactoryFactory {
        return ServiceFactoryFactoryFactory(container: container)
    }
}

// A simple factory that creates instances of ServiceFactoryFactoryFactoryFactory.
class ServiceFactoryFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactoryFactory() -> ServiceFactoryFactoryFactoryFactory {
        return ServiceFactoryFactoryFactoryFactory(container: container)
    }
}

// A simple factory that creates instances of ServiceFactoryFactoryFactoryFactoryFactory.
class ServiceFactoryFactoryFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactoryFactoryFactory() -> ServiceFactoryFactoryFactoryFactoryFactory {
        return ServiceFactoryFactoryFactoryFactoryFactory(container: container)
    }
}

// A simple factory that creates instances of ServiceFactoryFactoryFactoryFactoryFactoryFactory.
class ServiceFactoryFactoryFactoryFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createServiceFactoryFactoryFactoryFactoryFactoryFactory() -> ServiceFactoryFactoryFactoryFactoryFactoryFactory {
        return ServiceFactoryFactoryFactoryFactoryFactoryFactory(container: container)
    }
}

// A simple factory that creates instances of ServiceFactoryFactoryFactoryFactoryFactoryFactoryFactory.
class ServiceFactoryFactoryFactoryFactoryFactoryFactoryFactoryFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }

        return factory()
    }
}

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }

        return factory()
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainerProtocol

extension DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        fatalError("register() must be implemented")
    }

    func resolve<T>(_ type: T.Type) -> T? {
        fatalError("resolve() must be implemented")
    }
}

// MARK: - DIContainer

extension DIContainer {
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        let key = String(describing: type)
        factories[key] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        let key = String(describing: type)
        guard let factory = factories[key] as? () -> T else {
            return nil
        }
        return factory()
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        let key = String(describing: type)
        factories[key] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        let key = String(describing: type)
        guard let factory = factories[key] as? () -> T else {
            return nil
        }
        return factory()
    }
}

// Example usage:
let container = DIContainer()
container.register(MyService.self) {
    return MyService()
}

if let service = container.resolve(MyService.self) {
    service.doSomething()
}
```

This code

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

protocol ServiceProtocol {
    func doSomething()
}

class Service: ServiceProtocol {
    private let dependency: DependencyProtocol

    init(dependency: DependencyProtocol) {
        self.dependency = dependency
    }

    func doSomething() {
        dependency.doSomething()
    }
}

protocol DependencyProtocol {
    func doSomething()
}

class Dependency: DependencyProtocol {
    func doSomething() {
        print("Dependency did something!")
    }
}

class ServiceFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createService() -> ServiceProtocol {
        guard let dependency = container.resolve(DependencyProtocol.self) else {
            fatalError("Dependency not found!")
        }
        return Service(dependency: dependency)
    }
}

class Client {
    private let service: ServiceProtocol

    init(service: ServiceProtocol) {
        self.service = service
    }

    func doSomething() {
        service.doSomething()
    }
}

class Test {
    private let container: DIContainerProtocol
    private let factory: ServiceFactory

    init() {
        container = DIContainer()
        container.register(DependencyProtocol.self) { Dependency() }
        factory = ServiceFactory(container: container)
    }

    func run() {
        let service = factory.createService()
        let client = Client(service: service)
        client.doSomething()
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

// A simple service that depends on a dependency.
protocol ServiceProtocol {
    func doSomething()
}

class Service: ServiceProtocol {
    private let dependency: DependencyProtocol

    init(dependency: DependencyProtocol) {
        self.dependency = dependency
    }

    func doSomething() {
        dependency.doSomething()
    }
}

// A simple dependency that needs to be injected.
protocol DependencyProtocol {
    func doSomething()
}

class Dependency: DependencyProtocol {
    func doSomething() {
        print("Dependency did something!")
    }
}

// A simple factory that creates instances of Service.
class ServiceFactory {
    private let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createService() -> ServiceProtocol {
        guard let dependency = container.resolve(DependencyProtocol.self) else {
            fatalError("Dependency not found!")
        }
        return Service(dependency: dependency)
    }
}

// A simple client that uses the Service.
class Client {
    private let service: ServiceProtocol

    init(service: ServiceProtocol) {
        self.service = service
    }

    func doSomething() {
        service.doSomething()
    }
}

// A simple test that uses the Client.
class Test {
    private let container: DIContainerProtocol
    private let factory: ServiceFactory

    init() {
        container = DIContainer()
        container.register(DependencyProtocol.self) { Dependency() }
        factory = ServiceFactory(container: container)
    }

    func run() {
        let service = factory.createService()
        let client = Client(service: service)
        client.doSomething()
    }
}

// Run the test.
let test = Test()
test.run()
```

This code

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

class Service {
    let dependency: Dependency

    init(dependency: Dependency) {
        self.dependency = dependency
    }
}

class Dependency {
    let value: String

    init(value: String) {
        self.value = value
    }
}

class ViewController {
    let service: Service

    init(service: Service) {
        self.service = service
    }
}

class ServiceFactory {
    let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createService() -> Service {
        guard let dependency = container.resolve(Dependency.self) else {
            fatalError("Dependency not found")
        }
        return Service(dependency: dependency)
    }
}

class ViewControllerFactory {
    let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createViewController() -> ViewController {
        guard let service = container.resolve(Service.self) else {
            fatalError("Service not found")
        }
        return ViewController(service: service)
    }
}

class DependencyFactory {
    func createDependency() -> Dependency {
        return Dependency(value: "Hello, world!")
    }
}

class DIContainerFactory {
    func createDIContainer() -> DIContainerProtocol {
        let container = DIContainer()
        let dependencyFactory = DependencyFactory()
        let serviceFactory = ServiceFactory(container: container)
        let viewControllerFactory = ViewControllerFactory(container: container)

        container.register(Dependency.self) {
            dependencyFactory.createDependency()
        }

        container.register(Service.self) {
            serviceFactory.createService()
        }

        container.register(ViewController.self) {
            viewControllerFactory.createViewController()
        }

        return container
    }
}

class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

// A simple service that depends on a dependency.
class Service {
    let dependency: Dependency

    init(dependency: Dependency) {
        self.dependency = dependency
    }
}

// A simple dependency that can be injected into a service.
class Dependency {
    let value: String

    init(value: String) {
        self.value = value
    }
}

// A simple view controller that depends on a service.
class ViewController {
    let service: Service

    init(service: Service) {
        self.service = service
    }
}

// A simple factory that creates a service.
class ServiceFactory {
    let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createService() -> Service {
        guard let dependency = container.resolve(Dependency.self) else {
            fatalError("Dependency not found")
        }
        return Service(dependency: dependency)
    }
}

// A simple factory that creates a view controller.
class ViewControllerFactory {
    let container: DIContainerProtocol

    init(container: DIContainerProtocol) {
        self.container = container
    }

    func createViewController() -> ViewController {
        guard let service = container.resolve(Service.self) else {
            fatalError("Service not found")
        }
        return ViewController(service: service)
    }
}

// A simple factory that creates a dependency.
class DependencyFactory {
    func createDependency() -> Dependency {
        return Dependency(value: "Hello, world!")
    }
}

// A simple factory that creates a DI container.
class DIContainerFactory {
    func createDIContainer() -> DIContainerProtocol {
        let container = DIContainer()
        let dependencyFactory = DependencyFactory()
        let serviceFactory = ServiceFactory(container: container)
        let viewControllerFactory = ViewControllerFactory(container: container)

        container.register(Dependency.self) {
            dependencyFactory.createDependency()
        }

        container.register(Service.self) {
            serviceFactory.createService()
        }

        container.register(ViewController.self) {
            viewControllerFactory.createViewController()
        }

        return container
    }
}

// A simple factory that creates a view controller factory.
class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

// A simple factory that creates a view controller.
class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

// A simple factory that creates a view controller.
class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

// A simple factory that creates a view controller.
class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

// A simple factory that creates a view controller.
class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

// A simple factory that creates a view controller.
class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

// A simple factory that creates a view controller.
class ViewControllerFactoryFactory {
    func createViewControllerFactory() -> ViewControllerFactory {
        let container = DIContainerFactory().createDIContainer()
        return ViewControllerFactory(container: container)
    }
}

// A simple factory that creates a view controller.

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        factories[String(describing: type)] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] as? () -> T else {
            return nil
        }
        return factory()
    }
}

// Example usage:
let container = DIContainer()
container.register(MyService.self) {
    return MyService()
}

if let service = container.resolve(MyService.self) {
    service.doSomething()
}
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateHandlers: [State: [Event: (StateMachine<State, Event>) -> Void]] = [:]

    init(state: State) {
        self.state = state
    }

    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            print("No transition for state: \(state) and event: \(event)")
            return
        }

        state = nextState
        if let handler = stateHandlers[state][event] {
            handler(self)
        }
    }

    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }

    func registerHandler(for state: State, event: Event, handler: @escaping (StateMachine<State, Event>) -> Void) {
        stateHandlers[state] = [event: handler]
    }
}

enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateHandlers: [State: [Event: (StateMachine<State, Event>) -> Void]] = [:]

    init(state: State) {
        self.state = state
    }

    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            print("No transition for state: \(state) and event: \(event)")
            return
        }

        state = nextState
        if let handler = stateHandlers[state][event] {
            handler(self)
        }
    }

    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }

    func registerHandler(for state: State, event: Event, handler: @escaping (StateMachine<State, Event>) -> Void) {
        stateHandlers[state] = [event: handler]
    }
}

enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<State, Event>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.registerHandler(for: .running, event: .pause) { stateMachine in
    print("Paused")
}

stateMachine.registerHandler(for: .paused, event: .resume) { stateMachine in
    print("Resumed")
}

stateMachine.registerHandler(for: .idle, event: .start) { stateMachine in
    print("Started")
}

stateMachine.registerHandler(for: .running, event: .stop) { stateMachine in
    print("Stopped")
}

stateMachine.trigger(event: .start)
stateMachine.trigger(event: .pause)
stateMachine.trigger(event: .resume)
stateMachine.trigger(event: .stop)
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state]?[event] else {
            return
        }
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
}

enum State {
    case idle
    case running
    case paused
}

enum Event {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state]?[event] else {
            return
        }
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
}

// Example usage:
enum State {
    case idle
    case running
    case paused
}

enum Event {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<State, Event>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.trigger(event: .start)
print(stateMachine.state) // Output: running

stateMachine.trigger(event: .pause)
print(stateMachine.state) // Output: paused

stateMachine.trigger(event: .resume)
print(stateMachine.state) // Output: running

stateMachine.trigger(event: .stop)
print(stateMachine.state) // Output: idle
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var transitions: [State: [Event: State]] = [:]
    
    required init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[state][event] else {
            print("No transition registered for state: \(state) and event: \(event)")
            return
        }
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        if transitions[from] == nil {
            transitions[from] = [:]
        }
        transitions[from]?[event] = to
    }
}

enum LightState: Hashable {
    case off
    case on
}

enum LightEvent: Hashable {
    case turnOn
    case turnOff
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var transitions: [State: [Event: State]] = [:]
    
    required init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[state][event] else {
            print("No transition registered for state: \(state) and event: \(event)")
            return
        }
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        if transitions[from] == nil {
            transitions[from] = [:]
        }
        transitions[from]?[event] = to
    }
}

enum LightState: Hashable {
    case off
    case on
}

enum LightEvent: Hashable {
    case turnOn
    case turnOff
}

let light = StateMachine<LightState, LightEvent>(state: .off)
light.registerTransition(from: .off, to: .on, event: .turnOn)
light.registerTransition(from: .on, to: .off, event: .turnOff)

light.trigger(event: .turnOn)
print(light.state) // .on
light.trigger(event: .turnOff)
print(light.state) // .off
```

The above

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var transitions: [State: [Event: State]] = [:]
    var onStateChange: ((State) -> Void)?

    init(state: State) {
        self.state = state
    }

    func trigger(event: Event) {
        guard let nextState = transitions[state]?[event] else {
            return
        }

        state = nextState
        onStateChange?(state)
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from] = [event: to]
    }
}

enum MyState: Hashable {
    case idle
    case running
    case paused
}

enum MyEvent: Hashable {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var transitions: [State: [Event: State]] = [:]
    var onStateChange: ((State) -> Void)?

    init(state: State) {
        self.state = state
    }

    func trigger(event: Event) {
        guard let nextState = transitions[state]?[event] else {
            return
        }

        state = nextState
        onStateChange?(state)
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from] = [event: to]
    }
}

// Example usage:
enum MyState: Hashable {
    case idle
    case running
    case paused
}

enum MyEvent: Hashable {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<MyState, MyEvent>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.onStateChange = { state in
    print("State changed to: \(state)")
}

stateMachine.trigger(event: .start)
stateMachine.trigger(event: .pause)
stateMachine.trigger(event: .resume)
stateMachine.trigger(event: .stop)
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateChanged: ((State) -> Void)?
    var transitions: [State: [Event: State]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[state]?[event] else {
            return
        }
        state = nextState
        stateChanged?(state)
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from] = [event: to]
    }
}

enum State {
    case idle
    case running
    case paused
}

enum Event {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateChanged: ((State) -> Void)?
    var transitions: [State: [Event: State]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[state]?[event] else {
            return
        }
        state = nextState
        stateChanged?(state)
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from] = [event: to]
    }
}

// Example usage:
enum State {
    case idle
    case running
    case paused
}

enum Event {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<State, Event>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.stateChanged = { state in
    print("State changed to \(state)")
}

stateMachine.trigger(event: .start)
stateMachine.trigger(event: .pause)
stateMachine.trigger(event: .resume)
stateMachine.trigger(event: .stop)
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateChangeHandlers: [State: [(State) -> Void]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            print("No transition defined for state \(state) and event \(event)")
            return
        }
        
        state = nextState
        stateChangeHandlers[state]?.forEach { $0(nextState) }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
    
    func registerStateChangeHandler(for state: State, handler: @escaping (State) -> Void) {
        stateChangeHandlers[state] = [handler]
    }
}

enum MyState: Hashable {
    case idle
    case running
    case paused
}

enum MyEvent: Hashable {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateChangeHandlers: [State: [(State) -> Void]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            print("No transition defined for state \(state) and event \(event)")
            return
        }
        
        state = nextState
        stateChangeHandlers[state]?.forEach { $0(nextState) }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
    
    func registerStateChangeHandler(for state: State, handler: @escaping (State) -> Void) {
        stateChangeHandlers[state] = [handler]
    }
}

// Example usage
enum MyState: Hashable {
    case idle
    case running
    case paused
}

enum MyEvent: Hashable {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<MyState, MyEvent>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.registerStateChangeHandler(for: .running) { _ in
    print("Running state entered")
}

stateMachine.registerStateChangeHandler(for: .paused) { _ in
    print("Paused state entered")
}

stateMachine.trigger(event: .start)
stateMachine.trigger(event: .pause)
stateMachine.trigger(event: .resume)
stateMachine.trigger(event: .stop)
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateChanged: ((State) -> Void)?
    var stateTransitions: [State: [Event: State]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state]?[event] else {
            return
        }
        
        state = nextState
        stateChanged?(state)
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
}

enum State {
    case idle
    case running
    case paused
}

enum Event {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateChanged: ((State) -> Void)?
    var stateTransitions: [State: [Event: State]] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state]?[event] else {
            return
        }
        
        state = nextState
        stateChanged?(state)
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
}

// Example usage:
enum State {
    case idle
    case running
    case paused
}

enum Event {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<State, Event>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.stateChanged = { state in
    print("State changed to \(state)")
}

stateMachine.trigger(event: .start)
stateMachine.trigger(event: .pause)
stateMachine.trigger(event: .resume)
stateMachine.trigger(event: .stop)
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    
    required init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            return
        }
        
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
}

enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    
    required init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            return
        }
        
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
}

// Example usage:
enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<State, Event>(state: .idle)
stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.trigger(event: .start)
print(stateMachine.state) // Output: running

stateMachine.trigger(event: .pause)
print(stateMachine.state) // Output: paused

stateMachine.trigger(event: .resume)
print(stateMachine.state) // Output: running

stateMachine.trigger(event: .stop)
print(stateMachine.state) // Output: idle
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateHandlers: [State: [Event: (StateMachine<State, Event>) -> Void]] = [:]

    init(state: State) {
        self.state = state
    }

    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            print("No transition registered for event: \(event) from state: \(state)")
            return
        }

        state = nextState
        if let handler = stateHandlers[state][event] {
            handler(self)
        }
    }

    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }

    func registerHandler(for state: State, event: Event, handler: @escaping (StateMachine<State, Event>) -> Void) {
        stateHandlers[state] = [event: handler]
    }
}

enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateHandlers: [State: [Event: (StateMachine<State, Event>) -> Void]] = [:]

    init(state: State) {
        self.state = state
    }

    func trigger(event: Event) {
        guard let nextState = stateTransitions[state][event] else {
            print("No transition registered for event: \(event) from state: \(state)")
            return
        }

        state = nextState
        if let handler = stateHandlers[state][event] {
            handler(self)
        }
    }

    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }

    func registerHandler(for state: State, event: Event, handler: @escaping (StateMachine<State, Event>) -> Void) {
        stateHandlers[state] = [event: handler]
    }
}

enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<State, Event>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.registerHandler(for: .running, event: .pause) { stateMachine in
    print("Paused")
}

stateMachine.registerHandler(for: .paused, event: .resume) { stateMachine in
    print("Resumed")
}

stateMachine.registerHandler(for: .idle, event: .start) { stateMachine in
    print("Started")
}

stateMachine.registerHandler(for: .running, event: .stop) { stateMachine in
    print("Stopped")
}

stateMachine.trigger(event: .start)
stateMachine.trigger(event: .pause)
stateMachine.trigger(event: .resume)
stateMachine.trigger(event: .stop)
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateHandlers: [State: (Event) -> Void] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state]?[event] else {
            print("No transition registered for state: \(state) and event: \(event)")
            return
        }
        
        stateHandlers[state]?(event)
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
    
    func registerStateHandler(for state: State, handler: @escaping (Event) -> Void) {
        stateHandlers[state] = handler
    }
}

enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    var state: State
    var stateTransitions: [State: [Event: State]] = [:]
    var stateHandlers: [State: (Event) -> Void] = [:]
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        guard let nextState = stateTransitions[state]?[event] else {
            print("No transition registered for state: \(state) and event: \(event)")
            return
        }
        
        stateHandlers[state]?(event)
        state = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        stateTransitions[from] = [event: to]
    }
    
    func registerStateHandler(for state: State, handler: @escaping (Event) -> Void) {
        stateHandlers[state] = handler
    }
}

enum State: Hashable {
    case idle
    case running
    case paused
}

enum Event: Hashable {
    case start
    case stop
    case pause
    case resume
}

let stateMachine = StateMachine<State, Event>(state: .idle)

stateMachine.registerTransition(from: .idle, to: .running, event: .start)
stateMachine.registerTransition(from: .running, to: .paused, event: .pause)
stateMachine.registerTransition(from: .paused, to: .running, event: .resume)
stateMachine.registerTransition(from: .running, to: .idle, event: .stop)

stateMachine.registerStateHandler(for: .running) { event in
    switch event {
    case .start:
        print("Start")
    case .stop:
        print("Stop")
    case .pause:
        print("Pause")
    case .resume:
        print("Resume")
    }
}

stateMachine.trigger(event: .start)
stateMachine.trigger(event: .pause)
stateMachine.trigger(event: .resume)
stateMachine.trigger(event: .stop)
```

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

extension FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (size: \(size))")
        case .directory(let name, let contents):
            print("\(name) (contents: \(contents.count))")
            for node in contents {
                node.printFileSystemTree(level: level + 1)
            }
        }
    }
}

extension Array where Element == FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        for node in self {
            node.printFileSystemTree(level: level)
        }
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (size: \(size))")
        case .directory(let name, let contents):
            print("\(name) (contents: \(contents.count))")
            for node in contents {
                node.printFileSystemTree(level: level + 1)
            }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        for node in self {
            node.printFileSystemTree(level: level)
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (size: \(size))")
        case .directory(let name, let contents):
            print("\(name) (contents: \(contents.count))")
            for node in contents {
                node.printFileSystemTree(level: level + 1)
            }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        for node in self {
            node.printFileSystemTree(level: level)
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (size: \(size))")
        case .directory(let name, let contents):
            print("\(name) (contents: \(contents.count))")
            for node in contents {
                node.printFileSystemTree(level: level + 1)
            }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        for node in self {
            node.printFileSystemTree(level: level)
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

extension FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        switch self {
        case .file(let name, _):
            print("  ".repeated(level) + "-\(name)")
        case .directory(let name, let contents):
            print("  ".repeated(level) + "-\(name)")
            for content in contents {
                content.printFileSystemTree(level + 1)
            }
        }
    }
}

extension Array where Element == FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        for node in self {
            node.printFileSystemTree(level)
        }
    }
}

extension FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        switch self {
        case .file(let nodeName, _):
            return nodeName == name ? self : nil
        case .directory(let nodeName, let contents):
            if nodeName == name {
                return self
            }
            for content in contents {
                if let found = content.find(name) {
                    return found
                }
            }
            return nil
        }
    }
}

extension Array where Element == FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        for node in self {
            if let found = node.find(name) {
                return found
            }
        }
        return nil
    }
}

extension FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        switch self {
        case .file:
            return predicate(self) ? self : nil
        case .directory(_, let contents):
            for content in contents {
                if let found = content.find(predicate) {
                    return found
                }
            }
            return nil
        }
    }
}

extension Array where Element == FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        for node in self {
            if let found = node.find(predicate) {
                return found
            }
        }
        return nil
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        switch self {
        case .file(let name, _):
            print("  ".repeated(level) + "-\(name)")
        case .directory(let name, let contents):
            print("  ".repeated(level) + "-\(name)")
            for content in contents {
                content.printFileSystemTree(level + 1)
            }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystemTree(level: Int = 0) {
        for node in self {
            node.printFileSystemTree(level)
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        switch self {
        case .file(let nodeName, _):
            return nodeName == name ? self : nil
        case .directory(let nodeName, let contents):
            if nodeName == name {
                return self
            }
            for content in contents {
                if let found = content.find(name) {
                    return found
                }
            }
            return nil
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        for node in self {
            if let found = node.find(name) {
                return found
            }
        }
        return nil
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        switch self {
        case .file:
            return predicate(self) ? self : nil
        case .directory(_, let contents):
            for content in contents {
                if let found = content.find(predicate) {
                    return found
                }
            }
            return nil
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        for node in self {
            if let found = node.find(predicate) {
                return found
            }
        }
        return nil
    }
}

// Abstract file system manager and metadata calculation.

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) \(size)")
        case .directory(let name, let contents):
            print("\(name)")
            contents.forEach { $0.printFileSystem(level: level + 1) }
        }
    }
}

extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level: level) }
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) \(size)")
        case .directory(let name, let contents):
            print("\(name)")
            contents.forEach { $0.printFileSystem(level: level + 1) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level: level) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) \(size)")
        case .directory(let name, let contents):
            print("\(name)")
            contents.forEach { $0.printFileSystem(level: level + 1) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level: level) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) \(size)")
        case .directory(let name, let contents):
            print("\(name)")
            contents.forEach { $0.printFileSystem(level: level + 1) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level: level) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) \(size)")
        case .directory(let name, let contents):
            print("\(name)")
            contents

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

extension FileSystemNode {
    func printTree(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("  ".repeated(level) + "-\(name) \(size)")
        case .directory(let name, let contents):
            print("  ".repeated(level) + "-\(name)")
            contents.forEach { $0.printTree(level: level + 1) }
        }
    }
}

extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printTree(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("  ".repeated(level) + "-\(name) \(size)")
        case .directory(let name, let contents):
            print("  ".repeated(level) + "-\(name)")
            contents.forEach { $0.printTree(level: level + 1) }
        }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

extension FileSystemNode {
    func printFileSystemTree(depth: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (size: \(size))")
        case .directory(let name, let contents):
            print("\(name) (size: \(contents.totalSize), files: \(contents.filesCount), depth: \(contents.treeDepth))")
            for content in contents {
                content.printFileSystemTree(depth: depth + 1)
            }
        }
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystemTree(depth: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (size: \(size))")
        case .directory(let name, let contents):
            print("\(name) (size: \(contents.totalSize), files: \(contents.filesCount), depth: \(contents.treeDepth))")
            for content in contents {
                content.printFileSystemTree(depth: depth + 1)
            }
        }
    }
}

let fileSystem = FileSystemNode.directory(name: "/", contents: [
    FileSystemNode.directory(name: "A", contents: [
        FileSystemNode.file(name: "A1", size: 100),
        FileSystemNode.file(name: "A2", size: 200),
        FileSystemNode.file(name: "A3", size: 300),
    ]),
    FileSystemNode.directory(name: "B", contents: [
        FileSystemNode.file(name: "B1", size: 400),
        FileSystemNode.file(name: "B2", size: 500),
        FileSystemNode.file(name: "B3", size: 600),
    ]),
    FileSystemNode.directory(name: "C", contents: [
        FileSystemNode.file(name: "C1", size: 700),
        FileSystemNode.file(name: "C2", size: 800),
        FileSystemNode.file(name: "C3", size: 900),
    ]),
])

fileSystem.printFileSystemTree()
print("Total size: \(fileSystem.totalSize)")
print("Files count: \(fileSystem.filesCount)")
print("Tree depth: \(fileSystem.treeDepth)")
```

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return contents.reduce(0) { max($0, $1.treeDepth + 1) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth + 1) }
    }
}

extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, _):
            print("  ".repeated(level) + name)
        case .directory(let name, let contents):
            print("  ".repeated(level) + name)
            contents.forEach { $0.printFileSystem(level + 1) }
        }
    }
}

extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level) }
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return contents.reduce(0) { max($0, $1.treeDepth + 1) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth + 1) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, _):
            print("  ".repeated(level) + name)
        case .directory(let name, let contents):
            print("  ".repeated(level) + name)
            contents.forEach { $0.printFileSystem(level + 1) }
        }
    }
}

// Extension for String to repeat string.
extension String {
    func repeated(times: Int) -> String {
        return (0..<times).reduce("") { $0 + self }
    }
}

// Extension for String to repeat string.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level) }
    }
}

// Extension for String to repeat string.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, _):
            print("  ".repeated(level) + name)
        case .directory(let name, let contents):
            print("  ".repeated(level) + name)
            contents.forEach { $0.printFileSystem(level + 1) }
        }
    }
}

// Extension for String to repeat string.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level) }
    }
}

// Extension for String to repeat string.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, _):
            print("  ".repeated(level) + name)
        case .directory(let name, let contents):
            print("  ".repeated(level) + name)
            contents.forEach { $0.printFileSystem(level + 1) }
        }
    }
}

// Extension for String to repeat string.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level) }
    }
}

// Extension for String to repeat string.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, _):
            print("  ".repeated(level) + name)
        case .directory(let name, let contents):
            print("  ".repeated(level) + name)
            contents.forEach { $0.printFileSystem(level + 1) }
        }
    }
}

// Extension for String to repeat string.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level)

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return contents.reduce(0) { max($0, $1.treeDepth + 1) }
        }
    }
}

extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth + 1) }
    }
}

extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (\(size) bytes)")
        case .directory(let name, let contents):
            print("\(name)")
            contents.forEach { $0.printFileSystem(level: level + 1) }
        }
    }
}

extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level: level) }
    }
}

extension FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        switch self {
        case .file(let nodeName, _):
            return nodeName == name ? self : nil
        case .directory(let nodeName, let contents):
            return nodeName == name ? self : contents.compactMap { $0.find(name: name) }.first
        }
    }
}

extension Array where Element == FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        return self.compactMap { $0.find(name: name) }.first
    }
}

extension FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        switch self {
        case .file(let nodeName, _):
            return predicate(self) ? self : nil
        case .directory(let nodeName, let contents):
            return predicate(self) ? self : contents.compactMap { $0.find(predicate: predicate) }.first
        }
    }
}

extension Array where Element == FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        return self.compactMap { $0.find(predicate: predicate) }.first
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return contents.reduce(0) { max($0, $1.treeDepth + 1) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return self.reduce(0) { max($0, $1.treeDepth + 1) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (\(size) bytes)")
        case .directory(let name, let contents):
            print("\(name)")
            contents.forEach { $0.printFileSystem(level: level + 1) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func printFileSystem(level: Int = 0) {
        self.forEach { $0.printFileSystem(level: level) }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        switch self {
        case .file(let nodeName, _):
            return nodeName == name ? self : nil
        case .directory(let nodeName, let contents):
            return nodeName == name ? self : contents.compactMap { $0.find(name: name) }.first
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func find(name: String) -> FileSystemNode? {
        return self.compactMap { $0.find(name: name) }.first
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        switch self {
        case .file(let nodeName, _):
            return predicate(self) ? self : nil
        case .directory(let nodeName, let contents):
            return predicate(self) ? self : contents.compactMap { $0.find(predicate: predicate) }.first
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element == FileSystemNode {
    func find(predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        return self.compactMap { $0.find(predicate: predicate) }.first
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func find(name: String, predicate: (FileSystemNode) -> Bool) -> FileSystemNode? {
        switch self {
        case .file(let nodeName, _):

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return contents.reduce(0) { max($0, $1.treeDepth + 1) }
        }
    }
}

extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (\(size) bytes)")
        case .directory(let name, let contents):
            print("\(name)")
            for content in contents {
                content.printFileSystem(level: level + 1)
            }
        }
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return contents.reduce(0) { max($0, $1.treeDepth + 1) }
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func printFileSystem(level: Int = 0) {
        switch self {
        case .file(let name, let size):
            print("\(name) (\(size) bytes)")
        case .directory(let name, let contents):
            print("\(name)")
            for content in contents {
                content.printFileSystem(level: level + 1)
            }
        }
    }
}

let fileSystem = FileSystemNode.directory(
    name: "root",
    contents: [
        FileSystemNode.file(name: "file1", size: 100),
        FileSystemNode.file(name: "file2", size: 200),
        FileSystemNode.directory(
            name: "dir1",
            contents: [
                FileSystemNode.file(name: "file3", size: 300),
                FileSystemNode.file(name: "file4", size: 400),
                FileSystemNode.directory(
                    name: "dir2",
                    contents: [
                        FileSystemNode.file(name: "file5", size: 500),
                        FileSystemNode.file(name: "file6", size: 600),
                        FileSystemNode.directory(
                            name: "dir3",
                            contents: [
                                FileSystemNode.file(name: "file7", size: 700),
                                FileSystemNode.file(name: "file8", size: 800),
                                FileSystemNode.file(name: "file9", size: 900),
                            ]
                        ),
                    ]
                ),
            ]
        ),
    ]
)

fileSystem.printFileSystem()
print("Total size: \(fileSystem.totalSize)")
print("Files count: \(fileSystem.filesCount)")
print("Tree depth: \(fileSystem.treeDepth)")
```

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.map { $0.treeDepth }.max()!
        }
    }
}

extension Array where Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

extension Dictionary where Key == String, Value: FileSystemInfo {
    var totalSize: Int {
        return self.values.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.values.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.values.map { $0.treeDepth }.max()!
    }
}

extension Set where Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

extension Sequence where Iterator.Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

extension Collection where Iterator.Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(_, let size):
            return size
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file:
            return 1
        case .directory(_, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file:
            return 0
        case .directory(_, let contents):
            return 1 + contents.map { $0.treeDepth }.max()!
        }
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Array where Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Dictionary where Key == String, Value: FileSystemInfo {
    var totalSize: Int {
        return self.values.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.values.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.values.map { $0.treeDepth }.max()!
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Set where Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Sequence where Iterator.Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Collection where Iterator.Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension Sequence where Iterator.Element: FileSystemInfo {
    var totalSize: Int {
        return self.reduce(0) { $0 + $1.totalSize }
    }

    var filesCount: Int {
        return self.reduce(0) { $0 + $1.filesCount }
    }

    var treeDepth: Int {
        return 1 + self.map { $0.treeDepth }.max()!
    }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class StackWithPeek<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

class StackWithIsEmpty<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class StackWithCount<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

class StackWithTop<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.last
    }
}

class StackWithBottom<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }
}

class StackWithIsFull<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }

    func isFull() -> Bool {
        return elements.count == elements.capacity
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class StackWithPeek<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class StackWithIsEmpty<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class StackWithCount<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class StackWithTop<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class StackWithBottom<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, and isFull functions.
class StackWithIsFull<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }

    func isFull() -> Bool {
        return elements.count == elements.capacity
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, isFull, and isNotEmpty functions.
class StackWithIsNotEmpty<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack3<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
}

class Stack4<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var top: Element? {
        return elements.last
    }
}

class Stack5<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var top: Element? {
        return elements.last
    }
    
    var bottom: Element? {
        return elements.first
    }
}

class Stack6<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var top: Element? {
        return elements.last
    }
    
    var bottom: Element? {
        return elements.first
    }
    
    var isFull: Bool {
        return elements.count == 100
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack2<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack3<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack4<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var top: Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class Stack5<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var top: Element? {
        return elements.last
    }
    
    var bottom: Element? {
        return elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, and isFull functions.
class Stack6<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var top: Element? {
        return elements.last
    }
    
    var bottom: Element? {
        return elements.first
    }
    
    var isFull: Bool {
        return elements.count == 100
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, isFull, and isNotEmpty functions.
class Stack7<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }
}

class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }
}

class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }
}

class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    var debugDescription: String {
        return elements.debugDescription
    }
}

class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    var debugDescription: String {
        return elements.debugDescription
    }

    var hashValue: Int {
        return elements.hashValue
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and description functions.
class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, and debugDescription functions.
class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    var debugDescription: String {
        return elements.debugDescription
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, debugDescription, and hash functions.
class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    var debugDescription: String {
        return elements.debugDescription
    }

    var hashValue: Int {
        return elements.hashValue
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, debugDescription, hash, and isEqual functions.
class Stack7<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    var isEmpty: Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    var debugDescription: String {
        return elements.debugDescription
    }

    var hashValue: Int {
        return elements

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }
}

class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }
}

class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }

    func contains(_ element: Element) -> Bool {
        return elements.contains(element)
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, and contains functions.
class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }

    func contains(_ element: Element) -> Bool {
        return elements.contains(element)
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, contains, and remove functions.
class Stack7<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element?

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack7<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack8<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack9<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack10<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack11<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack12<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack13<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var items = [Element]()
    
    init() {}
    
    func push(_ element: Element) {
        items.append(element)
    }
    
    func pop() -> Element? {
        return items.popLast()
    }
}

class Queue<Element> {
    var items = [Element]()
    
    func enqueue(_ element: Element) {
        items.append(element)
    }
    
    func dequeue() -> Element? {
        return items.isEmpty ? nil : items.removeFirst()
    }
}

class LinkedList<Element> {
    var head: Node<Element>?
    
    func insert(_ element: Element) {
        let newNode = Node(element)
        newNode.next = head
        head = newNode
    }
    
    func remove() -> Element? {
        guard let node = head else { return nil }
        head = node.next
        return node.value
    }
}

class Node<Element> {
    var value: Element
    var next: Node<Element>?
    
    init(_ value: Element) {
        self.value = value
    }
}

class Tree<Element> {
    var root: Node<Element>?
    
    func insert(_ element: Element) {
        let newNode = Node(element)
        if root == nil {
            root = newNode
        } else {
            var current = root
            while let node = current {
                if element < node.value {
                    if node.left == nil {
                        node.left = newNode
                        return
                    }
                    current = node.left
                } else {
                    if node.right == nil {
                        node.right = newNode
                        return
                    }
                    current = node.right
                }
            }
        }
    }
    
    func remove(_ element: Element) {
        root = remove(element, from: root)
    }
    
    private func remove(_ element: Element, from node: Node<Element>?) -> Node<Element>? {
        guard let node = node else { return nil }
        if element < node.value {
            node.left = remove(element, from: node.left)
        } else if element > node.value {
            node.right = remove(element, from: node.right)
        } else {
            if node.left == nil {
                return node.right
            } else if node.right == nil {
                return node.left
            } else {
                let minNode = findMin(node.right)
                node.value = minNode.value
                node.right = remove(minNode.value, from: node.right)
            }
        }
        return node
    }
    
    private func findMin(_ node: Node<Element>) -> Node<Element> {
        var current = node
        while let left = current.left {
            current = left
        }
        return current
    }
}

class HashTable<Key: Hashable, Value> {
    private var buckets: [Bucket<Key, Value>]
    private let capacity: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.buckets = Array(repeating: Bucket(), count: capacity)
    }
    
    func insert(_ key: Key, value: Value) {
        let index = hash(key)
        buckets[index].insert(key, value: value)
    }
    
    func remove(_ key: Key) -> Value? {
        let index = hash(key)
        return buckets[index].remove(key)
    }
    
    func getValue(_ key: Key) -> Value? {
        let index = hash(key)
        return buckets[index].getValue(key)
    }
    
    private func hash(_ key: Key) -> Int {
        return abs(key.hashValue) % capacity
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var items = [Element]()
    
    init() {}
    
    func push(_ element: Element) {
        items.append(element)
    }
    
    func pop() -> Element? {
        return items.popLast()
    }
}

// Generic queue with enqueue and dequeue functions.
class Queue<Element> {
    var items = [Element]()
    
    func enqueue(_ element: Element) {
        items.append(element)
    }
    
    func dequeue() -> Element? {
        return items.isEmpty ? nil : items.removeFirst()
    }
}

// Generic linked list with insert and remove functions.
class LinkedList<Element> {
    var head: Node<Element>?
    
    func insert(_ element: Element) {
        let newNode = Node(element)
        newNode.next = head
        head = newNode
    }
    
    func remove() -> Element? {
        guard let node = head else { return nil }
        head = node.next
        return node.value
    }
}

// Generic node for linked list.
class Node<Element> {
    var value: Element
    var next: Node<Element>?
    
    init(_ value: Element) {
        self.value = value
    }
}

// Generic tree with insert and remove functions.
class Tree<Element> {
    var root: Node<Element>?
    
    func insert(_ element: Element) {
        let newNode = Node(element)
        if root == nil {
            root = newNode
        } else {
            var current = root
            while let node = current {
                if element < node.value {
                    if node.left == nil {
                        node.left = newNode
                        return
                    }
                    current = node.left
                } else {
                    if node.right == nil {
                        node.right = newNode
                        return
                    }
                    current = node.right
                }
            }
        }
    }
    
    func remove(_ element: Element) {
        root = remove(element, from: root)
    }
    
    private func remove(_ element: Element, from node: Node<Element>?) -> Node<Element>? {
        guard let node = node else { return nil }
        if element < node.value {
            node.left = remove(element, from: node.left)
        } else if element > node.value {
            node.right = remove(element, from: node.right)
        } else {
            if node.left == nil {
                return node.right
            } else if node.right == nil {
                return node.left
            } else {
                let minNode = findMin(node.right)
                node.value = minNode.value
                node.right = remove(minNode.value, from: node.right)
            }
        }
        return node
    }
    
    private func findMin(_ node: Node<Element>) -> Node<Element> {
        var current = node
        while let left = current.left {
            current = left
        }
        return current
    }
}

// Generic hash table with insert and remove functions.
class HashTable<Key: Hashable, Value> {
    private var buckets: [Bucket<Key, Value>]
    private let capacity: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.buckets = Array(repeating: Bucket(), count: capacity)
    }
    
    func insert(_ key: Key, value: Value) {
        let index = hash(key)
        buckets[index].insert(key, value: value)
    }
    
    func remove(_ key: Key) -> Value? {
        let index = hash(key)
        return buckets[index].remove(key)
    }
    
    func getValue(_ key: Key) -> Value? {
        let index = hash(key)
        return buckets[index].getValue(key)
    }
    
    private func hash(_ key: Key) -> Int {
        return abs(key.hashValue) % capacity
    }
}

// Generic bucket for hash table.
class Bucket<Key: Hashable, Value> {
    private var items = [Key: Value]()
    
    func insert(_ key: Key, value: Value) {
        items[key] = value
    }
    

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }
}

class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }
}

class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    subscript(index: Int) -> Element {
        return elements[index]
    }
}

class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    subscript(index: Int) -> Element {
        return elements[index]
    }

    func append(_ element: Element) {
        elements.append(element)
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and description functions.
class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, and subscript functions.
class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    subscript(index: Int) -> Element {
        return elements[index]
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, subscript, and append functions.
class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    subscript(index: Int) -> Element {
        return elements[index]
    }

    func append(_ element: Element) {
        elements.append(element)
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, subscript, append, and remove functions.
class Stack7<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    var count: Int {
        return elements.count
    }

    var description: String {
        return elements.description
    }

    subscript(index: Int) -> Element {
        return elements

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }
}

class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }
}

class Stack7<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }

    func contains(_ element: Element) -> Bool {
        return elements.contains(element)
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack5<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class Stack6<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, and contains functions.
class Stack7<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func top() -> Element? {
        return elements.first
    }

    func bottom() -> Element? {
        return elements.last
    }

    func contains(_ element: Element) -> Bool {
        return elements.contains(element)
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, contains, and remove functions.
class Stack8<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack3<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
}

class Stack4<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var description: String {
        return elements.description
    }
}

class Stack5<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var description: String {
        return elements.description
    }
    
    init(elements: [Element]) {
        self.elements = elements
    }
}

class Stack6<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var description: String {
        return elements.description
    }
    
    init(elements: [Element]) {
        self.elements = elements
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack2<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack3<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and description functions.
class Stack4<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var description: String {
        return elements.description
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, and init functions.
class Stack5<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var description: String {
        return elements.description
    }
    
    init(elements: [Element]) {
        self.elements = elements
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, and init functions.
class Stack6<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    var count: Int {
        return elements.count
    }
    
    var description: String {
        return elements.description
    }
    
    init(elements: [Element]) {
        self.elements = elements
    }
}

// Generic stack with push, pop, peek, isEmpty, count, description, and init functions.
class Stack7<Element>: StackProtocol {
    var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class StackWithPeek<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

class StackWithCount<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }
}

class StackWithIsEmpty<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class StackWithTop<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func top() -> Element? {
        return elements.last
    }
}

class StackWithBottom<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }
}

class StackWithIsFull<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }

    func isFull() -> Bool {
        return elements.count == elements.capacity
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class StackWithPeek<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, and count functions.
class StackWithCount<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, count, and isEmpty functions.
class StackWithIsEmpty<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, count, isEmpty, and top functions.
class StackWithTop<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func top() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, count, isEmpty, top, and bottom functions.
class StackWithBottom<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }
}

// Generic stack with push, pop, peek, count, isEmpty, top, bottom, and isFull functions.
class StackWithIsFull<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func count() -> Int {
        return elements.count
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func top() -> Element? {
        return elements.last
    }

    func bottom() -> Element? {
        return elements.first
    }

    func isFull() -> Bool {
        return elements.count == elements.capacity
    }
}

// Generic stack with push, pop, peek, count, isEmpty, top, bottom, isFull, and isNotEmpty functions.
class StackWithIsNotEmpty<Element>: StackProtocol {
    var elements: [Element] = []

    init() {}

    func push(_ element: Element) {

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }

    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateAccessOrder(key: key)
            return element
        }
        set {
            if let newValue = newValue {
                if cache.count == capacity {
                    removeLRU()
                }
                cache[key] = newValue
                updateAccessOrder(key: key)
            } else {
                cache[key] = nil
                accessOrder = accessOrder.filter { $0 != key }
            }
        }
    }

    private func updateAccessOrder(key: Key) {
        accessOrder = accessOrder.filter { $0 != key }
        accessOrder.append(key)
    }

    private func removeLRU() {
        guard let lruKey = accessOrder.first else { return }
        cache.removeValue(forKey: lruKey)
        accessOrder.removeFirst()
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }

    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateAccessOrder(key: key)
            return element
        }
        set {
            if let newValue = newValue {
                if cache.count == capacity {
                    removeLRU()
                }
                cache[key] = newValue
                updateAccessOrder(key: key)
            } else {
                cache[key] = nil
                accessOrder = accessOrder.filter { $0 != key }
            }
        }
    }

    private func updateAccessOrder(key: Key) {
        accessOrder = accessOrder.filter { $0 != key }
        accessOrder.append(key)
    }

    private func removeLRU() {
        guard let lruKey = accessOrder.first else { return }
        cache.removeValue(forKey: lruKey)
        accessOrder.removeFirst()
    }
}

// Test the cache implementation
let cache = Cache<Int, String>(capacity: 3)
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
print(cache[1]) // Output: Optional("One")
cache[4] = "Four"
print(cache[2]) // Output: nil
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            accessOrder.append(key)
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = element
                accessOrder.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            }
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            accessOrder.append(key)
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = element
                accessOrder.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            }
        }
    }
}

// Test the cache
let cache = Cache<Int, String>(capacity: 3)
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
print(cache[1]) // "One"
cache[1] = "One Updated"
print(cache[1]) // "One Updated"
cache[4] = "Four"
print(cache[2]) // nil
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    var count: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
        self.count = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            access[key] = count
            return element
        }
        set {
            if let element = newValue {
                if count < capacity {
                    cache[key] = element
                    access[key] = count
                    count += 1
                } else {
                    let leastRecentlyUsedKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                    access.removeValue(forKey: leastRecentlyUsedKey)
                    cache[key] = element
                    access[key] = count
                }
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
                count -= 1
            }
        }
    }
}

class Cache2<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    var count: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
        self.count = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            access[key] = count
            return element
        }
        set {
            if let element = newValue {
                if count < capacity {
                    cache[key] = element
                    access[key] = count
                    count += 1
                } else {
                    let leastFrequentlyUsedKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                    access.removeValue(forKey: leastFrequentlyUsedKey)
                    cache[key] = element
                    access[key] = count
                }
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
                count -= 1
            }
        }
    }
}

class Cache3<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    var count: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
        self.count = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            access[key] = count
            return element
        }
        set {
            if let element = newValue {
                if count < capacity {
                    cache[key] = element
                    access[key] = count
                    count += 1
                } else {
                    let oldestKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: oldestKey)
                    access.removeValue(forKey: oldestKey)
                    cache[key] = element
                    access[key] = count
                }
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
                count -= 1
            }
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    var count: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
        self.count = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            access[key] = count
            return element
        }
        set {
            if let element = newValue {
                if count < capacity {
                    cache[key] = element
                    access[key] = count
                    count += 1
                } else {
                    let leastRecentlyUsedKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                    access.removeValue(forKey: leastRecentlyUsedKey)
                    cache[key] = element
                    access[key] = count
                }
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
                count -= 1
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache2<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    var count: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
        self.count = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            access[key] = count
            return element
        }
        set {
            if let element = newValue {
                if count < capacity {
                    cache[key] = element
                    access[key] = count
                    count += 1
                } else {
                    let leastFrequentlyUsedKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                    access.removeValue(forKey: leastFrequentlyUsedKey)
                    cache[key] = element
                    access[key] = count
                }
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
                count -= 1
            }
        }
    }
}

// Generic in-memory cache that follows to the FIFO (First In First Out) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the oldest item to make space for new entries.
class Cache3<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    var count: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
        self.count = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            access[key] = count
            return element
        }
        set {
            if let element = newValue {
                if count < capacity {
                    cache[key] = element
                    access[key] = count
                    count += 1
                } else {
                    let oldestKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: oldestKey)
                    access.removeValue(forKey: oldestKey)
                    cache[key] = element
                    access[key] = count
                }
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
                count -= 1
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var accessHistory: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessHistory = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            accessHistory.removeAll(where: { $0 == key })
            accessHistory.append(key)
            return value
        }
        set {
            if let value = newValue {
                if cache.count >= capacity {
                    let leastRecentlyUsedKey = accessHistory.first!
                    accessHistory.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = value
                accessHistory.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessHistory.removeAll(where: { $0 == key })
            }
        }
    }
}

class Cache2<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var accessHistory: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessHistory = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            accessHistory.removeAll(where: { $0 == key })
            accessHistory.append(key)
            return value
        }
        set {
            if let value = newValue {
                if cache.count >= capacity {
                    let leastFrequentlyUsedKey = accessHistory.first!
                    accessHistory.removeFirst()
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                }
                cache[key] = value
                accessHistory.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessHistory.removeAll(where: { $0 == key })
            }
        }
    }
}

class Cache3<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var accessHistory: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessHistory = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            accessHistory.removeAll(where: { $0 == key })
            accessHistory.append(key)
            return value
        }
        set {
            if let value = newValue {
                if cache.count >= capacity {
                    let leastRecentlyUsedKey = accessHistory.first!
                    accessHistory.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = value
                accessHistory.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessHistory.removeAll(where: { $0 == key })
            }
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var accessHistory: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessHistory = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            accessHistory.removeAll(where: { $0 == key })
            accessHistory.append(key)
            return value
        }
        set {
            if let value = newValue {
                if cache.count >= capacity {
                    let leastRecentlyUsedKey = accessHistory.first!
                    accessHistory.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = value
                accessHistory.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessHistory.removeAll(where: { $0 == key })
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache2<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var accessHistory: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessHistory = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            accessHistory.removeAll(where: { $0 == key })
            accessHistory.append(key)
            return value
        }
        set {
            if let value = newValue {
                if cache.count >= capacity {
                    let leastFrequentlyUsedKey = accessHistory.first!
                    accessHistory.removeFirst()
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                }
                cache[key] = value
                accessHistory.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessHistory.removeAll(where: { $0 == key })
            }
        }
    }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache3<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var accessHistory: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessHistory = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            accessHistory.removeAll(where: { $0 == key })
            accessHistory.append(key)
            return value
        }
        set {
            if let value = newValue {
                if cache.count >= capacity {
                    let leastRecentlyUsedKey = accessHistory.first!
                    accessHistory.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = value
                accessHistory.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessHistory.removeAll(where: { $0 == key })
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache4<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var accessHistory: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessHistory = []
    }
    
    subscript(key: Key)

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            access[key] = access[key]! + 1
            return value
        }
        set {
            if let value = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                    access.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = value
                access[key] = 0
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
            }
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: [Key: Element]
    var access: [Key: Int]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.access = [:]
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let value = cache[key] else { return nil }
            access[key] = access[key]! + 1
            return value
        }
        set {
            if let value = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = access.min(by: { $0.value < $1.value })!.key
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                    access.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = value
                access[key] = 0
            } else {
                cache.removeValue(forKey: key)
                access.removeValue(forKey: key)
            }
        }
    }
}

// Test the cache
let cache = Cache<Int, String>(capacity: 3)
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "One"
cache[2] = "Two"
cache[3] = "Three"
cache[4] = "Four"
print(cache[1]) // Output: Optional("One")
print(cache[2]) // Output: Optional("Two")
print(cache[3]) // Output: Optional("Three")
print(cache[4]) // Output: Optional("Four")
cache[1] = "

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    private var cache: [Key: Element]
    private var keys: [Key]
    private let capacity: Int

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.keys = []
    }

    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            keys.removeAll(where: { $0 == key })
            keys.append(key)
            return element
        }
        set {
            if let value = newValue {
                cache[key] = value
                keys.removeAll(where: { $0 == key })
                keys.append(key)
                if keys.count > capacity {
                    let leastRecentlyUsedKey = keys.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
            } else {
                cache.removeValue(forKey: key)
                keys.removeAll(where: { $0 == key })
            }
        }
    }
}

class Cache2<Key: Hashable, Element>: CacheProtocol {
    private var cache: [Key: Element]
    private var keys: [Key]
    private var frequencies: [Key: Int]
    private let capacity: Int

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.keys = []
        self.frequencies = [:]
    }

    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateFrequency(key: key)
            return element
        }
        set {
            if let value = newValue {
                cache[key] = value
                keys.removeAll(where: { $0 == key })
                keys.append(key)
                updateFrequency(key: key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                    frequencies.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else {
                cache.removeValue(forKey: key)
                keys.removeAll(where: { $0 == key })
                frequencies.removeValue(forKey: key)
            }
        }
    }

    private func updateFrequency(key: Key) {
        let currentFrequency = frequencies[key] ?? 0
        frequencies[key] = currentFrequency + 1
        keys.removeAll(where: { $0 == key })
        keys.append(key)
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    private var cache: [Key: Element]
    private var keys: [Key]
    private let capacity: Int

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.keys = []
    }

    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            keys.removeAll(where: { $0 == key })
            keys.append(key)
            return element
        }
        set {
            if let value = newValue {
                cache[key] = value
                keys.removeAll(where: { $0 == key })
                keys.append(key)
                if keys.count > capacity {
                    let leastRecentlyUsedKey = keys.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
            } else {
                cache.removeValue(forKey: key)
                keys.removeAll(where: { $0 == key })
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache2<Key: Hashable, Element>: CacheProtocol {
    private var cache: [Key: Element]
    private var keys: [Key]
    private var frequencies: [Key: Int]
    private let capacity: Int

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.keys = []
        self.frequencies = [:]
    }

    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateFrequency(key: key)
            return element
        }
        set {
            if let value = newValue {
                cache[key] = value
                keys.removeAll(where: { $0 == key })
                keys.append(key)
                updateFrequency(key: key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                    frequencies.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else {
                cache.removeValue(forKey: key)
                keys.removeAll(where: { $0 == key })
                frequencies.removeValue(forKey: key)
            }
        }
    }

    private func updateFrequency(key: Key) {
        let currentFrequency = frequencies[key] ?? 0
        frequencies[key] = currentFrequency + 1
        keys.removeAll(where: { $0 == key })
        keys.append(key)
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache3<Key: Hashable, Element>: CacheProtocol {
    private var cache: [Key: Element]
    private var keys: [Key]
    private var frequencies: [Key: Int]
    private let capacity: Int

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.keys = []
        self.frequencies = [:]
    }

    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateFrequency(key: key)
            return element
        }
        set {
            if let value = newValue {
                cache[key] = value
                keys.removeAll(where: { $0 == key })
                keys.append(key)
                updateFrequency(key: key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                    frequencies.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else {
                cache.removeValue(forKey: key)
                keys.removeAll(where: { $0 == key })
                frequencies.removeValue(forKey: key)
            }
        }
    }

    private func update

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var elements: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.elements = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            return elements[key]
        }
        set(newValue) {
            if let newValue = newValue {
                elements[key] = newValue
                keys.append(key)
                if keys.count > capacity {
                    let leastRecentlyUsedKey = keys.removeFirst()
                    elements.removeValue(forKey: leastRecentlyUsedKey)
                }
            } else {
                elements.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

class Cache2<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var elements: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.elements = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            return elements[key]
        }
        set(newValue) {
            if let newValue = newValue {
                elements[key] = newValue
                keys.append(key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    elements.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else {
                elements.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

class Cache3<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var elements: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.elements = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            return elements[key]
        }
        set(newValue) {
            if let newValue = newValue {
                elements[key] = newValue
                keys.append(key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    elements.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else {
                elements.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var elements: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.elements = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            return elements[key]
        }
        set(newValue) {
            if let newValue = newValue {
                elements[key] = newValue
                keys.append(key)
                if keys.count > capacity {
                    let leastRecentlyUsedKey = keys.removeFirst()
                    elements.removeValue(forKey: leastRecentlyUsedKey)
                }
            } else {
                elements.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache2<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var elements: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.elements = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            return elements[key]
        }
        set(newValue) {
            if let newValue = newValue {
                elements[key] = newValue
                keys.append(key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    elements.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else {
                elements.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache3<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var elements: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.elements = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            return elements[key]
        }
        set(newValue) {
            if let newValue = newValue {
                elements[key] = newValue
                keys.append(key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    elements.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else {
                elements.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache4<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var elements: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.elements = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            return elements[key]
        }
        set(newValue) {
            if let newValue = newValue {
                elements[key] = newValue
                keys.append(key)
                if keys.count > capacity {
                    let leastFrequentlyUsedKey = keys.removeFirst()
                    elements.removeValue(forKey: leastFrequentlyUsedKey)
                }
            } else

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateAccessOrder(key: key)
            return element
        }
        set {
            if let newValue = newValue {
                if cache.count >= capacity {
                    removeLRU()
                }
                cache[key] = newValue
                updateAccessOrder(key: key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder = accessOrder.filter { $0 != key }
            }
        }
    }
    
    private func updateAccessOrder(key: Key) {
        accessOrder = accessOrder.filter { $0 != key }
        accessOrder.append(key)
    }
    
    private func removeLRU() {
        guard let lruKey = accessOrder.first else { return }
        cache.removeValue(forKey: lruKey)
        accessOrder.removeFirst()
    }
}

class LFUCache<Key: Hashable, Element>: CacheProtocol {
    
    private var capacity: Int
    private var cache: [Key: Element]
    private var frequency: [Int: [Key]]
    private var minFrequency: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.frequency = [:]
        self.minFrequency = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateFrequency(key: key)
            return element
        }
        set {
            if let newValue = newValue {
                if cache.count >= capacity {
                    removeLFU()
                }
                cache[key] = newValue
                updateFrequency(key: key)
            } else {
                cache.removeValue(forKey: key)
                frequency.values.forEach { $0.removeAll(where: { $0 == key }) }
            }
        }
    }
    
    private func updateFrequency(key: Key) {
        let currentFrequency = frequency[minFrequency]!.count
        if currentFrequency >= capacity {
            removeLFU()
        }
        
        if let _ = frequency[minFrequency]!.first(where: { $0 == key }) {
            frequency[minFrequency]!.removeAll(where: { $0 == key })
        }
        
        let newFrequency = minFrequency + 1
        frequency[newFrequency, default: []].append(key)
        minFrequency = newFrequency
    }
    
    private func removeLFU() {
        guard let lfuKey = frequency[minFrequency]!.first else { return }
        cache.removeValue(forKey: lfuKey)
        frequency[minFrequency]!.removeFirst()
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateAccessOrder(key: key)
            return element
        }
        set {
            if let newValue = newValue {
                if cache.count >= capacity {
                    removeLRU()
                }
                cache[key] = newValue
                updateAccessOrder(key: key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder = accessOrder.filter { $0 != key }
            }
        }
    }
    
    private func updateAccessOrder(key: Key) {
        accessOrder = accessOrder.filter { $0 != key }
        accessOrder.append(key)
    }
    
    private func removeLRU() {
        guard let lruKey = accessOrder.first else { return }
        cache.removeValue(forKey: lruKey)
        accessOrder.removeFirst()
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class LFUCache<Key: Hashable, Element>: CacheProtocol {
    
    private var capacity: Int
    private var cache: [Key: Element]
    private var frequency: [Int: [Key]]
    private var minFrequency: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.frequency = [:]
        self.minFrequency = 0
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateFrequency(key: key)
            return element
        }
        set {
            if let newValue = newValue {
                if cache.count >= capacity {
                    removeLFU()
                }
                cache[key] = newValue
                updateFrequency(key: key)
            } else {
                cache.removeValue(forKey: key)
                frequency.values.forEach { $0.removeAll(where: { $0 == key }) }
            }
        }
    }
    
    private func updateFrequency(key: Key) {
        let currentFrequency = frequency[minFrequency]!.count
        if currentFrequency >= capacity {
            removeLFU()
        }
        
        if let _ = frequency[minFrequency]!.first(where: { $0 == key }) {
            frequency[minFrequency]!.removeAll(where: { $0 == key })
        }
        
        let newFrequency = minFrequency + 1
        frequency[newFrequency, default: []].append(key)
        minFrequency = newFrequency
    }
    
    private func removeLFU() {
        guard let lfuKey = frequency[minFrequency]!.first else { return }
        cache.removeValue(forKey: lfuKey)
        frequency[minFrequency]!.removeFirst()
    }
}

// Generic in-memory cache that follows to the FIFO (First In First Out) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the oldest item to make space for new entries.
class FIFOCache<Key: Hashable, Element>: CacheProtocol {
    
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            updateAccessOrder(key: key)
            return element
        }
        set {
            if let newValue = newValue {
                if cache.count >= capacity {
                    removeFIFO()
                }
                cache[key] = newValue
                updateAccess

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var items: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.items = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let index = keys.firstIndex(of: key) else { return nil }
            let item = items[key]!
            keys.remove(at: index)
            keys.append(key)
            return item
        }
        set {
            if let value = newValue {
                if items.count == capacity {
                    let leastRecentlyUsedKey = keys.first!
                    keys.removeFirst()
                    items.removeValue(forKey: leastRecentlyUsedKey)
                }
                items[key] = value
                keys.append(key)
            } else {
                items.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var items: [Key: Element]
    var keys: [Key]
    
    init(capacity: Int) {
        self.capacity = capacity
        self.items = [:]
        self.keys = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let index = keys.firstIndex(of: key) else { return nil }
            let item = items[key]!
            keys.remove(at: index)
            keys.append(key)
            return item
        }
        set {
            if let value = newValue {
                if items.count == capacity {
                    let leastRecentlyUsedKey = keys.first!
                    keys.removeFirst()
                    items.removeValue(forKey: leastRecentlyUsedKey)
                }
                items[key] = value
                keys.append(key)
            } else {
                items.removeValue(forKey: key)
                if let index = keys.firstIndex(of: key) {
                    keys.remove(at: index)
                }
            }
        }
    }
}

// Test the cache implementation
let cache = Cache<Int, String>(capacity: 3)
cache[1] = "one"
cache[2] = "two"
cache[3] = "three"
print(cache[1]) // Output: "one"
cache[1] = "one updated"
print(cache[1]) // Output: "one updated"
cache[4] = "four"
print(cache[2]) // Output: nil
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            accessOrder.append(key)
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = element
                accessOrder.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            }
        }
    }
}

class Cache2<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessCount: [Key: Int]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessCount = [:]
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessCount[key] = (accessCount[key] ?? 0) + 1
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastFrequentlyUsedKey = accessCount.min(by: { $0.value < $1.value })!.key
                    accessCount.removeValue(forKey: leastFrequentlyUsedKey)
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                }
                cache[key] = element
                accessCount[key] = (accessCount[key] ?? 0) + 1
            } else {
                cache.removeValue(forKey: key)
                accessCount.removeValue(forKey: key)
            }
        }
    }
}

class Cache3<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            accessOrder.append(key)
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = element
                accessOrder.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            }
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            accessOrder.append(key)
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = element
                accessOrder.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache2<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessCount: [Key: Int]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessCount = [:]
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessCount[key] = (accessCount[key] ?? 0) + 1
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastFrequentlyUsedKey = accessCount.min(by: { $0.value < $1.value })!.key
                    accessCount.removeValue(forKey: leastFrequentlyUsedKey)
                    cache.removeValue(forKey: leastFrequentlyUsedKey)
                }
                cache[key] = element
                accessCount[key] = (accessCount[key] ?? 0) + 1
            } else {
                cache.removeValue(forKey: key)
                accessCount.removeValue(forKey: key)
            }
        }
    }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache3<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Element]
    private var accessOrder: [Key]
    
    required init(capacity: Int) {
        self.capacity = capacity
        self.cache = [:]
        self.accessOrder = []
    }
    
    subscript(key: Key) -> Element? {
        get {
            guard let element = cache[key] else { return nil }
            accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            accessOrder.append(key)
            return element
        }
        set {
            if let element = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(forKey: leastRecentlyUsedKey)
                }
                cache[key] = element
                accessOrder.append(key)
            } else {
                cache.removeValue(forKey: key)
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
            }
        }
    }
}

// Generic in-memory cache that follows to the LFU (Least Frequently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least frequently used item to make space for new entries.
class Cache4<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (value: Value, expiration: TimeInterval)] = [:]
    private var expirationInterval: TimeInterval = 0.0
    
    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        let expirationDate = Date().addingTimeInterval(expiration)
        cache[key] = (value, expirationDate.timeIntervalSince1970)
    }
    
    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else {
            return nil
        }
        
        if Date().timeIntervalSince1970 > expiration {
            cache.removeValue(forKey: key)
            return nil
        }
        
        return value
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(newValue) {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            
            put(value: newValue, key: key, expiration: expirationInterval)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (value: Value, expiration: TimeInterval)] = [:]
    private var expirationInterval: TimeInterval = 0.0
    
    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        let expirationDate = Date().addingTimeInterval(expiration)
        cache[key] = (value, expirationDate.timeIntervalSince1970)
    }
    
    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else {
            return nil
        }
        
        if Date().timeIntervalSince1970 > expiration {
            cache.removeValue(forKey: key)
            return nil
        }
        
        return value
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(newValue) {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            
            put(value: newValue, key: key, expiration: expirationInterval)
        }
    }
}

// Example usage:
let cache = ExpirableCache<String, Int>(expirationInterval: 10.0)
cache.put(value: 42, key: "answer", expiration: 5.0)
print(cache.get(key: "answer")) // Optional(42)
sleep(10)
print(cache.get(key: "answer")) // nil

// Using subscript:
cache["answer"] = 42
print(cache["answer"]) // Optional(42)
sleep(10)
print(cache["answer"]) // nil
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expiration = [Key: TimeInterval]()
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expiration[key] = Date().timeIntervalSince1970 + expiration
    }
    
    func get(key: Key) -> Value? {
        guard let expirationDate = expiration[key], expirationDate > Date().timeIntervalSince1970 else {
            return nil
        }
        
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(value) {
            guard let value = value else {
                cache.removeValue(forKey: key)
                expiration.removeValue(forKey: key)
                return
            }
            
            put(value: value, key: key, expiration: 10)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expiration = [Key: TimeInterval]()
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expiration[key] = Date().timeIntervalSince1970 + expiration
    }
    
    func get(key: Key) -> Value? {
        guard let expirationDate = expiration[key], expirationDate > Date().timeIntervalSince1970 else {
            return nil
        }
        
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(value) {
            guard let value = value else {
                cache.removeValue(forKey: key)
                expiration.removeValue(forKey: key)
                return
            }
            
            put(value: value, key: key, expiration: 10)
        }
    }
}

// Example usage
let cache = ExpirableCache<Int, String>()
cache.put(value: "Hello", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Hello"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Goodbye", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Goodbye"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Hello", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Hello"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Goodbye", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Goodbye"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Hello", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Hello"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Goodbye", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Goodbye"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Hello", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Hello"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Goodbye", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Goodbye"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Hello", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Hello"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Goodbye", key: 1, expiration: 10)
print(cache.get(key: 1)) // "Goodbye"
cache.put(value: "World", key: 1, expiration: 10)
print(cache.get(key: 1)) // "World"
cache.put(value: "Hello", key: 1, expiration: 10)

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (value: Value, expiration: TimeInterval)] = [:]
    private var expiration: TimeInterval = 0.0

    init(expiration: TimeInterval) {
        self.expiration = expiration
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = (value, expiration)
    }

    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else {
            return nil
        }

        if expiration < Date().timeIntervalSince1970 {
            cache.removeValue(forKey: key)
            return nil
        }

        return value
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(newValue) {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: newValue, key: key, expiration: expiration)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (value: Value, expiration: TimeInterval)] = [:]
    private var expiration: TimeInterval = 0.0

    init(expiration: TimeInterval) {
        self.expiration = expiration
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = (value, expiration)
    }

    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else {
            return nil
        }

        if expiration < Date().timeIntervalSince1970 {
            cache.removeValue(forKey: key)
            return nil
        }

        return value
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(newValue) {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: newValue, key: key, expiration: expiration)
        }
    }
}

// Example usage:
let cache = ExpirableCache<String, String>(expiration: 300)
cache.put(value: "Value1", key: "Key1", expiration: 600)
cache.put(value: "Value2", key: "Key2", expiration: 900)

print(cache["Key1"]) // Output: "Value1"
print(cache["Key2"]) // Output: "Value2"

cache["Key1"] = "UpdatedValue1"
print(cache["Key1"]) // Output: "UpdatedValue1"

cache["Key3"] = "Value3"
print(cache["Key3"]) // Output: "Value3"

cache["Key3"] = nil
print(cache["Key3"]) // Output: nil
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expiration: [Key: TimeInterval] = [:]

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expiration[key] = expiration
    }

    func get(key: Key) -> Value? {
        guard let expirationDate = expiration[key] else {
            return nil
        }

        if Date().timeIntervalSince1970 > expirationDate {
            cache.removeValue(forKey: key)
            expiration.removeValue(forKey: key)
            return nil
        }

        return cache[key]
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(newValue) {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                expiration.removeValue(forKey: key)
                return
            }
            put(value: newValue, key: key, expiration: 0)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expiration: [Key: TimeInterval] = [:]

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expiration[key] = expiration
    }

    func get(key: Key) -> Value? {
        guard let expirationDate = expiration[key] else {
            return nil
        }

        if Date().timeIntervalSince1970 > expirationDate {
            cache.removeValue(forKey: key)
            expiration.removeValue(forKey: key)
            return nil
        }

        return cache[key]
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(newValue) {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                expiration.removeValue(forKey: key)
                return
            }
            put(value: newValue, key: key, expiration: 0)
        }
    }
}

// Example usage
let cache = ExpirableCache<Int, String>()
cache.put(value: "Value1", key: 1, expiration: 10)
cache.put(value: "Value2", key: 2, expiration: 5)

print(cache.get(key: 1)) // Output: Optional("Value1")
print(cache.get(key: 2)) // Output: Optional("Value2")

cache[1] = "UpdatedValue1"
cache[2] = "UpdatedValue2"

print(cache.get(key: 1)) // Output: Optional("UpdatedValue1")
print(cache.get(key: 2)) // Output: Optional("UpdatedValue2")

sleep(10)

print(cache.get(key: 1)) // Output: nil
print(cache.get(key: 2)) // Output: nil
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    
    private var cache: [Key: Value] = [:]
    private var expiration: [Key: TimeInterval] = [:]
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expiration[key] = expiration
    }
    
    func get(key: Key) -> Value? {
        let now = Date().timeIntervalSince1970
        guard let expirationDate = expiration[key],
            expirationDate > now else {
                return nil
        }
        
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            guard let value = newValue else {
                cache.removeValue(forKey: key)
                expiration.removeValue(forKey: key)
                return
            }
            put(value: value, key: key, expiration: 10)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    
    private var cache: [Key: Value] = [:]
    private var expiration: [Key: TimeInterval] = [:]
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expiration[key] = expiration
    }
    
    func get(key: Key) -> Value? {
        let now = Date().timeIntervalSince1970
        guard let expirationDate = expiration[key],
            expirationDate > now else {
                return nil
        }
        
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            guard let value = newValue else {
                cache.removeValue(forKey: key)
                expiration.removeValue(forKey: key)
                return
            }
            put(value: value, key: key, expiration: 10)
        }
    }
}

let cache = ExpirableCache<String, Int>()
cache.put(value: 1, key: "key1", expiration: 10)
cache.put(value: 2, key: "key2", expiration: 10)
cache.put(value: 3, key: "key3", expiration: 10)
cache.put(value: 4, key: "key4", expiration: 10)
cache.put(value: 5, key: "key5", expiration: 10)

cache["key1"] = 11
cache["key2"] = 12
cache["key3"] = 13
cache["key4"] = 14
cache["key5"] = 15

cache["key1"] = 111
cache["key2"] = 121
cache["key3"] = 131
cache["key4"] = 141
cache["key5"] = 151

cache["key1"] = 1111
cache["key2"] = 1211
cache["key3"] = 1311
cache["key4"] = 1411
cache["key5"] = 1511

cache["key1"] = 11111
cache["key2"] = 12111
cache["key3"] = 13111
cache["key4"] = 14111
cache["key5"] = 15111

cache["key1"] = 111111
cache["key2"] = 121111
cache["key3"] = 131111
cache["key4"] = 141111
cache["key5"] = 151111

cache["key1"] = 1111111
cache["key2"] = 1211111
cache["key3"] = 1311111
cache["key4"] = 1411111
cache["key5"] = 1511111

cache["key1"] = 11111111
cache["key2"] = 12111111
cache["key3"] = 13111111
cache["key4"] = 14111111
cache["key5"] = 15111111

cache["key1"] = 111111111
cache["key2"] = 121111111
cache["key3"] = 131111111
cache["key4"] = 141111111
cache["key5"] = 151111111

cache["key1"] = 1111111111
cache["key2"] = 1211111111
cache["key3"] = 1311111111
cache["key4"] = 1411111111
cache["key5"] = 1511111111

cache["key1"] = 11111111111
cache["key2

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (Value, TimeInterval)] = [:]

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = (value, Date().timeIntervalSince1970 + expiration)
    }

    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else {
            return nil
        }

        if Date().timeIntervalSince1970 > expiration {
            cache.removeValue(forKey: key)
            return nil
        }

        return value
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(value) {
            guard let value = value else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: value, key: key, expiration: 60)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (Value, TimeInterval)] = [:]

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = (value, Date().timeIntervalSince1970 + expiration)
    }

    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else {
            return nil
        }

        if Date().timeIntervalSince1970 > expiration {
            cache.removeValue(forKey: key)
            return nil
        }

        return value
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(value) {
            guard let value = value else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: value, key: key, expiration: 60)
        }
    }
}

// Test
let cache = ExpirableCache<String, Int>()
cache.put(value: 1, key: "key1", expiration: 10)
cache.put(value: 2, key: "key2", expiration: 10)
cache.put(value: 3, key: "key3", expiration: 10)

cache["key1"] = 100
cache["key2"] = 200
cache["key3"] = 300

print(cache.get(key: "key1")) // 100
print(cache.get(key: "key2")) // 200
print(cache.get(key: "key3")) // 300

print(cache["key1"]) // 100
print(cache["key2"]) // 200
print(cache["key3"]) // 300

sleep(10)

print(cache.get(key: "key1")) // nil
print(cache.get(key: "key2")) // nil
print(cache.get(key: "key3")) // nil

print(cache["key1"]) // nil
print(cache["key2"]) // nil
print(cache["key3"]) // nil
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expirationTimes = [Key: TimeInterval]()
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expirationTimes[key] = Date().timeIntervalSince1970 + expiration
    }
    
    func get(key: Key) -> Value? {
        guard let expiration = expirationTimes[key] else {
            return nil
        }
        
        if expiration < Date().timeIntervalSince1970 {
            cache.removeValue(forKey: key)
            expirationTimes.removeValue(forKey: key)
            return nil
        }
        
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(value) {
            put(value: value!, key: key, expiration: 60)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expirationTimes = [Key: TimeInterval]()
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expirationTimes[key] = Date().timeIntervalSince1970 + expiration
    }
    
    func get(key: Key) -> Value? {
        guard let expiration = expirationTimes[key] else {
            return nil
        }
        
        if expiration < Date().timeIntervalSince1970 {
            cache.removeValue(forKey: key)
            expirationTimes.removeValue(forKey: key)
            return nil
        }
        
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set(value) {
            put(value: value!, key: key, expiration: 60)
        }
    }
}

// Example usage
let cache = ExpirableCache<String, String>()
cache.put(value: "value1", key: "key1", expiration: 60)
cache.put(value: "value2", key: "key2", expiration: 120)

print(cache.get(key: "key1")) // "value1"
print(cache.get(key: "key2")) // "value2"

cache["key1"] = "new value"
print(cache.get(key: "key1")) // "new value"

cache["key3"] = "value3"
print(cache.get(key: "key3")) // "value3"

cache["key1"] = nil
print(cache.get(key: "key1")) // nil
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: (Value, Date)]()
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        let expirationDate = Date().addingTimeInterval(expiration)
        cache[key] = (value, expirationDate)
    }
    
    func get(key: Key) -> Value? {
        guard let (value, expirationDate) = cache[key] else {
            return nil
        }
        
        if expirationDate < Date() {
            cache.removeValue(forKey: key)
            return nil
        }
        
        return value
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            guard let value = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            
            put(value: value, key: key, expiration: 60)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: (Value, Date)]()
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        let expirationDate = Date().addingTimeInterval(expiration)
        cache[key] = (value, expirationDate)
    }
    
    func get(key: Key) -> Value? {
        guard let (value, expirationDate) = cache[key] else {
            return nil
        }
        
        if expirationDate < Date() {
            cache.removeValue(forKey: key)
            return nil
        }
        
        return value
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            guard let value = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            
            put(value: value, key: key, expiration: 60)
        }
    }
}

let cache = ExpirableCache<String, Int>()
cache.put(value: 1, key: "key1", expiration: 10)
cache.put(value: 2, key: "key2", expiration: 10)
cache["key1"] = 3
cache["key2"] = 4
cache["key3"] = 5
cache["key1"] = nil
cache["key2"] = nil
cache["key3"] = nil
print(cache["key1"])
print(cache["key2"])
print(cache["key3"])
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (value: Value, expiration: TimeInterval)] = [:]
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = (value, expiration)
    }
    
    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else { return nil }
        if Date().timeIntervalSince1970 > expiration {
            cache.removeValue(forKey: key)
            return nil
        }
        return value
    }
    
    subscript(key: Key) -> Value? {
        get { return get(key: key) }
        set {
            guard let value = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: value, key: key, expiration: 0)
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: (value: Value, expiration: TimeInterval)] = [:]
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = (value, expiration)
    }
    
    func get(key: Key) -> Value? {
        guard let (value, expiration) = cache[key] else { return nil }
        if Date().timeIntervalSince1970 > expiration {
            cache.removeValue(forKey: key)
            return nil
        }
        return value
    }
    
    subscript(key: Key) -> Value? {
        get { return get(key: key) }
        set {
            guard let value = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: value, key: key, expiration: 0)
        }
    }
}

// Example usage
let cache = ExpirableCache<String, Int>()
cache.put(value: 1, key: "key1", expiration: 10)
cache.put(value: 2, key: "key2", expiration: 5)
cache["key1"] = 3
cache["key2"] = 4
print(cache["key1"]) // 3
print(cache["key2"]) // 4
print(cache["key3"]) // nil
cache["key1"] = nil
print(cache["key1"]) // nil
```

This code

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expirationDates = [Key: TimeInterval]()
    private var timer: Timer?
    
    init() {
        timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
            self?.removeExpiredItems()
        }
    }
    
    deinit {
        timer?.invalidate()
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expirationDates[key] = Date().timeIntervalSince1970 + expiration
    }
    
    func get(key: Key) -> Value? {
        removeExpiredItems()
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: newValue, key: key, expiration: 60)
        }
    }
    
    private func removeExpiredItems() {
        let now = Date().timeIntervalSince1970
        cache = cache.filter { expirationDates[$0.key] ?? 0 > now }
        expirationDates = expirationDates.filter { expirationDates[$0.key] ?? 0 > now }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expirationDates = [Key: TimeInterval]()
    private var timer: Timer?
    
    init() {
        timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
            self?.removeExpiredItems()
        }
    }
    
    deinit {
        timer?.invalidate()
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expirationDates[key] = Date().timeIntervalSince1970 + expiration
    }
    
    func get(key: Key) -> Value? {
        removeExpiredItems()
        return cache[key]
    }
    
    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            guard let newValue = newValue else {
                cache.removeValue(forKey: key)
                return
            }
            put(value: newValue, key: key, expiration: 60)
        }
    }
    
    private func removeExpiredItems() {
        let now = Date().timeIntervalSince1970
        cache = cache.filter { expirationDates[$0.key] ?? 0 > now }
        expirationDates = expirationDates.filter { expirationDates[$0.key] ?? 0 > now }
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    private func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            encryptedData.append(byte)
        }

        return encryptedData
    }

    private func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            decryptedData.append(byte)
        }

        return decryptedData
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    private func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            encryptedData.append(byte)
        }

        return encryptedData
    }

    private func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            decryptedData.append(byte)
        }

        return decryptedData
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    private func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            encryptedData.append(byte)
        }

        return encryptedData
    }

    private func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            decryptedData.append(byte)
        }

        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    private func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            encryptedData.append(byte)
        }

        return encryptedData
    }

    private func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            decryptedData.append(byte)
        }

        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    private func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.count]
            encryptedData.append(byte)
        }

        return encryptedData
    }

    private func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)

        for i in 0..<data.count {
            let byte = UInt8(bitPattern: data[i]) ^ keyData[i % keyData.

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        var encryptedDataIndex = 0

        for byte in data {
            let keyByte = keyData[encryptedDataIndex % keyData.count]
            let encryptedByte = byte ^ keyByte
            encryptedData.replaceSubrange(encryptedDataIndex..<encryptedDataIndex + 1, with: [encryptedByte])
            encryptedDataIndex += 1
        }

        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        var decryptedDataIndex = 0

        for byte in data {
            let keyByte = keyData[decryptedDataIndex % keyData.count]
            let decryptedByte = byte ^ keyByte
            decryptedData.replaceSubrange(decryptedDataIndex..<decryptedDataIndex + 1, with: [decryptedByte])
            decryptedDataIndex += 1
        }

        return decryptedData
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        var encryptedDataIndex = 0

        for byte in data {
            let keyByte = keyData[encryptedDataIndex % keyData.count]
            let encryptedByte = byte ^ keyByte
            encryptedData.replaceSubrange(encryptedDataIndex..<encryptedDataIndex + 1, with: [encryptedByte])
            encryptedDataIndex += 1
        }

        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        var decryptedDataIndex = 0

        for byte in data {
            let keyByte = keyData[decryptedDataIndex % keyData.count]
            let decryptedByte = byte ^ keyByte
            decryptedData.replaceSubrange(decryptedDataIndex..<decryptedDataIndex + 1, with: [decryptedByte])
            decryptedDataIndex += 1
        }

        return decryptedData
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let encryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(encryptedBytes)
            }
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let decryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(decryptedBytes)
            }
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let encryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(encryptedBytes)
            }
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let decryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(decryptedBytes)
            }
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let encryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(encryptedBytes)
            }
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let decryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(decryptedBytes)
            }
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let encryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(encryptedBytes)
            }
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let decryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(decryptedBytes)
            }
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let encryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(encryptedBytes)
            }
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let decryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(decryptedBytes)
            }
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let encryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(encryptedBytes)
            }
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let decryptedBytes = dataBytes.map { $0 ^ keyBytes.pointee }
                return Data(decryptedBytes)
            }
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (dataBytes: UnsafeRawBufferPointer) -> Data in
            keyData.withUnsafeBytes { (keyBytes: UnsafeRawBufferPointer) -> Data in
                let encrypted

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let encryptedByte = dataByte ^ keyByte
            encryptedData.replaceSubrange(i..<i+1, with: [encryptedByte])
            i += 1
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let decryptedByte = dataByte ^ keyByte
            decryptedData.replaceSubrange(i..<i+1, with: [decryptedByte])
            i += 1
        }
        return decryptedData
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let encryptedByte = dataByte ^ keyByte
            encryptedData.replaceSubrange(i..<i+1, with: [encryptedByte])
            i += 1
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let decryptedByte = dataByte ^ keyByte
            decryptedData.replaceSubrange(i..<i+1, with: [decryptedByte])
            i += 1
        }
        return decryptedData
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let encryptedByte = dataByte ^ keyByte
            encryptedData.replaceSubrange(i..<i+1, with: [encryptedByte])
            i += 1
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let decryptedByte = dataByte ^ keyByte
            decryptedData.replaceSubrange(i..<i+1, with: [decryptedByte])
            i += 1
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let encryptedByte = dataByte ^ keyByte
            encryptedData.replaceSubrange(i..<i+1, with: [encryptedByte])
            i += 1
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        var i = 0
        while i < data.count {
            let keyByte = keyData[i % keyData.count]
            let dataByte = data[i]
            let decryptedByte = dataByte ^ keyByte
            decryptedData.replaceSubrange(i..<i+1, with: [decryptedByte])
            i += 1
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        var i = 0
        while i < data.count

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.update(bytes: [data[i] ^ keyData[i % keyData.count]], at: i)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.update(bytes: [data[i] ^ keyData[i % keyData.count]], at: i)
        }
        return decryptedData
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = encrypt(data, key)
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = decrypt(data, key)
        let decryptedString = String(data: decryptedData, encoding: .utf8)!
        return decryptedString
    }

    func encrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.update(bytes: [data[i] ^ keyData[i % keyData.count]], at: i)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.update(bytes: [data[i] ^ keyData[i % keyData.count]], at: i)
        }
        return decryptedData
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let encryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(encryptedBytes)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let decryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(decryptedBytes)
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let encryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(encryptedBytes)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let decryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(decryptedBytes)
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let encryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(encryptedBytes)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let decryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(decryptedBytes)
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let encryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(encryptedBytes)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let decryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(decryptedBytes)
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let encryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(encryptedBytes)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let decryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(decryptedBytes)
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let encryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(encryptedBytes)
        }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let decryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(decryptedBytes)
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let encryptedData = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> Data in
            let encryptedBytes = bytes.map { byte in
                let keyByte = key.data(using: .utf8)!.withUnsafeBytes { $0.load(as: UInt8.self) }
                return byte ^ keyByte
            }
            return Data(encryptedBytes)
        }
        return encryptedData

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

// Simple encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

// Simple encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

// Simple encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer) -> Data in
            let encryptedTextBytes = plainTextBytes.map { $0 ^ key.utf8.first! }
            return Data(encryptedTextBytes)
        }
        return encryptedText
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let encryptedText = data.withUnsafeBytes { (encryptedTextBytes: UnsafeRawBufferPointer) -> Data in
            let decryptedTextBytes = encryptedTextBytes.map { $0 ^ key.utf8.first! }
            return Data(decryptedTextBytes)
        }
        return String(data: encryptedText, encoding: .utf8)!
    }
}

// Simple encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor5: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let plainText = string.data(using: .utf8)!
        let encryptedText = plainText.withUnsafeBytes { (plainTextBytes: UnsafeRawBufferPointer)

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        for i in 0..<data.count {
            encryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        for i in 0..<data.count {
            decryptedData.append(data[i] ^ keyData[i % keyData.count])
        }
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor5: EncryptorProtocol {
    func encrypt

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let stringData = string.data(using: .utf8)!
        
        var encryptedData = Data(count: stringData.count)
        
        for i in 0..<stringData.count {
            let keyByte = keyData[i % keyData.count]
            let stringByte = stringData[i]
            let encryptedByte = stringByte ^ keyByte
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let keyByte = keyData[i % keyData.count]
            let encryptedByte = data[i]
            let decryptedByte = encryptedByte ^ keyByte
            decryptedData.append(decryptedByte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let stringData = string.data(using: .utf8)!
        
        var encryptedData = Data(count: stringData.count)
        
        for i in 0..<stringData.count {
            let keyByte = keyData[i % keyData.count]
            let stringByte = stringData[i]
            let encryptedByte = stringByte ^ keyByte
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let keyByte = keyData[i % keyData.count]
            let encryptedByte = data[i]
            let decryptedByte = encryptedByte ^ keyByte
            decryptedData.append(decryptedByte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let stringData = string.data(using: .utf8)!
        
        var encryptedData = Data(count: stringData.count)
        
        for i in 0..<stringData.count {
            let keyByte = keyData[i % keyData.count]
            let stringByte = stringData[i]
            let encryptedByte = stringByte ^ keyByte
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let keyByte = keyData[i % keyData.count]
            let encryptedByte = data[i]
            let decryptedByte = encryptedByte ^ keyByte
            decryptedData.append(decryptedByte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let stringData = string.data(using: .utf8)!
        
        var encryptedData = Data(count: stringData.count)
        
        for i in 0..<stringData.count {
            let keyByte = keyData[i % keyData.count]
            let stringByte = stringData[i]
            let encryptedByte = stringByte ^ keyByte
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let keyByte = keyData[i % keyData.count]
            let encryptedByte = data[i]
            let decryptedByte = encryptedByte ^ keyByte
            decryptedData.append(decryptedByte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let stringData = string.data(using: .utf8)!
        
        var encryptedData = Data(count: stringData.count)
        
        for i in 0..<stringData.count {
            let keyByte = keyData[i % keyData.count]
            let stringByte = stringData[i]
            let encryptedByte = stringByte ^ keyByte
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let keyByte = keyData[i % keyData.count]
            let encryptedByte = data[i]
            let decryptedByte = encryptedByte ^ keyByte
            decryptedData.append(decryptedByte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let stringData = string.data(using: .utf8)!
        
        var encryptedData = Data(count: stringData.count)
        
        for i in 0..<stringData.count {
            let keyByte = keyData[i % keyData.count]
            let stringByte = stringData[i]
            let encryptedByte = stringByte ^ keyByte
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let keyByte = keyData[i % keyData.count]
            let encryptedByte = data[i]
            let decryptedByte = encryptedByte ^ keyByte
            decryptedData.append(decryptedByte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyData = key.data(using: .utf8)!
        let stringData = string.data(using: .utf8)!
        
        var encryptedData = Data(count: stringData.count)

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let byte = data[i] ^ keyData[i % keyData.count]
            encryptedData.append(byte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let byte = data[i] ^ keyData[i % keyData.count]
            decryptedData.append(byte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

class AES256Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let iv = Data(count: kCCBlockSizeAES128)
        
        let cryptLength = data.count + kCCBlockSizeAES128
        let cryptData = NSMutableData(length: cryptLength)
        
        let keyLength = kCCKeySizeAES256
        
        let options = CCOptions(kCCOptionPKCS7Padding)
        
        var bytesLength = Int(0)
        
        let cryptStatus = CCCrypt(CCOperation(kCCEncrypt),
                                  CCAlgorithm(kCCAlgorithmAES128),
                                  options,
                                  keyData.bytes,
                                  keyLength,
                                  iv.bytes,
                                  data.bytes,
                                  data.count,
                                  cryptData!.mutableBytes,
                                  cryptLength,
                                  &bytesLength)
        
        if UInt32(cryptStatus) == UInt32(kCCSuccess) {
            cryptData?.length = bytesLength + kCCBlockSizeAES128
        } else {
            print("Error: \(cryptStatus)")
        }
        
        return cryptData! as Data
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let iv = Data(count: kCCBlockSizeAES128)
        
        let cryptLength = data.count + kCCBlockSizeAES128
        let cryptData = NSMutableData(length: cryptLength)
        
        let keyLength = kCCKeySizeAES256
        
        let options = CCOptions(kCCOptionPKCS7Padding)
        
        var bytesLength = Int(0)
        
        let cryptStatus = CCCrypt(CCOperation(kCCDecrypt),
                                  CCAlgorithm(kCCAlgorithmAES128),
                                  options,
                                  keyData.bytes,
                                  keyLength,
                                  iv.bytes,
                                  data.bytes,
                                  data.count,
                                  cryptData!.mutableBytes,
                                  cryptLength,
                                  &bytesLength)
        
        if UInt32(cryptStatus) == UInt32(kCCSuccess) {
            cryptData?.length = bytesLength
        } else {
            print("Error: \(cryptStatus)")
        }
        
        return String(data: cryptData! as Data, encoding: .utf8)!
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        var encryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let byte = data[i] ^ keyData[i % keyData.count]
            encryptedData.append(byte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        var decryptedData = Data(count: data.count)
        
        for i in 0..<data.count {
            let byte = data[i] ^ keyData[i % keyData.count]
            decryptedData.append(byte)
        }
        
        return String(data: decryptedData, encoding: .utf8)!
    }
}

// Encryptor that uses AES256 to encrypt and decrypt data.
class AES256Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let iv = Data(count: kCCBlockSizeAES128)
        
        let cryptLength = data.count + kCCBlockSizeAES128
        let cryptData = NSMutableData(length: cryptLength)
        
        let keyLength = kCCKeySizeAES256
        
        let options = CCOptions(kCCOptionPKCS7Padding)
        
        var bytesLength = Int(0)
        
        let cryptStatus = CCCrypt(CCOperation(kCCEncrypt),
                                  CCAlgorithm(kCCAlgorithmAES128),
                                  options,
                                  keyData.bytes,
                                  keyLength,
                                  iv.bytes,
                                  data.bytes,
                                  data.count,
                                  cryptData!.mutableBytes,
                                  cryptLength,
                                  &bytesLength)
        
        if UInt32(cryptStatus) == UInt32(kCCSuccess) {
            cryptData?.length = bytesLength + kCCBlockSizeAES128
        } else {
            print("Error: \(cryptStatus)")
        }
        
        return cryptData! as Data
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let iv = Data(count: kCCBlockSizeAES128)
        
        let cryptLength = data.count + kCCBlockSizeAES128
        let cryptData = NSMutableData(length: cryptLength)
        
        let keyLength = kCCKeySizeAES256
        
        let options = CCOptions(kCCOptionPKCS7Padding)
        
        var bytesLength = Int(0)
        
        let cryptStatus = CCCrypt(CCOperation(kCCDecrypt),
                                  CCAlgorithm(kCCAlgorithmAES128),
                                  options,
                                  keyData.bytes,
                                  keyLength,
                                  iv.bytes,
                                  data.bytes,
                                  data.count,
                                  cryptData!.mutableBytes,
                                  cryptLength,
                                  &bytesLength)
        
        if UInt32(cryptStatus) == UInt32(kCCSuccess) {
            cryptData?.length = bytesLength
        } else {
            print("Error: \(cryptStatus)")
        }
        
        return String(data: cryptData! as Data, encoding: .utf8)!
    }
}

// Encryptor that uses RSA to encrypt and decrypt data.
class RSAEncryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        
        let publicKey = SecKeyCreateWithData(keyData as CFData,
                                              [kSecAttrKeyType: kSecAttrKeyTypeRSA,
                                               kSecAttrKeyClass: kSecAttrKeyClassPublic] as CFDictionary,
                                              nil)
        
        let encryptedData = SecKeyCreateEncryptedData(publicKey!,
                                                       [kSec

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0
    
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        if currentTime - lastRequestTime > timeInterval {
            lastRequestTime = currentTime
            return true
        }
        
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0
    
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        if currentTime - lastRequestTime > timeInterval {
            lastRequestTime = currentTime
            return true
        }
        
        return false
    }
}
```

This code

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requests: Int
    private var lastRequestTime: TimeInterval

    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requests = 0
        self.lastRequestTime = 0
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        let timeSinceLastRequest = currentTime - lastRequestTime

        if timeSinceLastRequest > timeInterval {
            requests = 0
            lastRequestTime = currentTime
        }

        if requests < maxRequests {
            requests += 1
            return true
        }

        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requests: Int
    private var lastRequestTime: TimeInterval

    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requests = 0
        self.lastRequestTime = 0
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        let timeSinceLastRequest = currentTime - lastRequestTime

        if timeSinceLastRequest > timeInterval {
            requests = 0
            lastRequestTime = currentTime
        }

        if requests < maxRequests {
            requests += 1
            return true
        }

        return false
    }
}

// Example usage:
let rateLimiter = RateLimiter(maxRequests: 5, timeInterval: 10)

for _ in 1...10 {
    if rateLimiter.allowRequest() {
        print("Request allowed")
    } else {
        print("Request denied")
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which the maximum number of requests is allowed.
    private let timeInterval: TimeInterval
    
    // The number of requests made within the current time interval.
    private var requestCount: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Public Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the request count and start time.
        if currentTime > startTime + timeInterval {
            requestCount = 0
            startTime = currentTime
        }
        
        // If the request count is less than the maximum number of requests, allow the request and increment the request count.
        if requestCount < maxRequests {
            requestCount += 1
            return true
        }
        
        // If the request count is equal to or greater than the maximum number of requests, deny the request.
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which the maximum number of requests is allowed.
    private let timeInterval: TimeInterval
    
    // The number of requests made within the current time interval.
    private var requestCount: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Public Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the request count and start time.
        if currentTime > startTime + timeInterval {
            requestCount = 0
            startTime = currentTime
        }
        
        // If the request count is less than the maximum number of requests, allow the request and increment the request count.
        if requestCount < maxRequests {
            requestCount += 1
            return true
        }
        
        // If the request count is equal to or greater than the maximum number of requests, deny the request.
        return false
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which the maximum number of requests is allowed.
    private let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    private var currentRequests: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if currentTime > startTime + timeInterval {
            currentRequests = 0
            startTime = currentTime
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, do not allow the request.
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which the maximum number of requests is allowed.
    private let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    private var currentRequests: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if currentTime > startTime + timeInterval {
            currentRequests = 0
            startTime = currentTime
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, do not allow the request.
        return false
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which requests are allowed.
    private let timeInterval: TimeInterval
    
    // The current count of requests made within the time interval.
    private var requestCount: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // Check if the current time interval has expired.
        if currentTime - startTime > timeInterval {
            requestCount = 0
            startTime = currentTime
        }
        
        // Check if the request count has reached the maximum limit.
        if requestCount >= maxRequests {
            return false
        }
        
        // Increment the request count and allow the request.
        requestCount += 1
        return true
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which requests are allowed.
    private let timeInterval: TimeInterval
    
    // The current count of requests made within the time interval.
    private var requestCount: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // Check if the current time interval has expired.
        if currentTime - startTime > timeInterval {
            requestCount = 0
            startTime = currentTime
        }
        
        // Check if the request count has reached the maximum limit.
        if requestCount >= maxRequests {
            return false
        }
        
        // Increment the request count and allow the request.
        requestCount += 1
        return true
    }
}

// Example usage:
let rateLimiter = RateLimiter(maxRequests: 10, timeInterval: 60)

for _ in 0..<100 {
    if rateLimiter.allowRequest() {
        print("Request allowed")
    } else {
        print("Request denied")
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    let maxRequests: Int
    
    // The time interval in seconds within which the maximum number of requests is allowed.
    let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    var currentRequests: Int = 0
    
    // The start time of the current time interval.
    var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    // Returns true if the request can be made, false otherwise.
    func allowRequest() -> Bool {
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if Date().timeIntervalSince1970 > startTime + timeInterval {
            currentRequests = 0
            startTime = Date().timeIntervalSince1970
        }
        
        // If the current requests count is less than the maximum requests, increment the current requests count and return true.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, return false.
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    let maxRequests: Int
    
    // The time interval in seconds within which the maximum number of requests is allowed.
    let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    var currentRequests: Int = 0
    
    // The start time of the current time interval.
    var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    // Returns true if the request can be made, false otherwise.
    func allowRequest() -> Bool {
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if Date().timeIntervalSince1970 > startTime + timeInterval {
            currentRequests = 0
            startTime = Date().timeIntervalSince1970
        }
        
        // If the current requests count is less than the maximum requests, increment the current requests count and return true.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, return false.
        return false
    }
}

// MARK: - Usage

// Create a RateLimiter with a maximum number of requests of 5 and a time interval of 10 seconds.
let rateLimiter = RateLimiter(maxRequests: 5, timeInterval: 10)

// Attempt to make 10 requests.
for _ in 0..<10 {
    if rateLimiter.allowRequest() {
        print("Request allowed")
    } else {
        print("Request denied")
    }
}

// Output:
// Request allowed
// Request allowed
// Request allowed
// Request allowed
// Request allowed
// Request denied
// Request denied
// Request denied
// Request denied
// Request denied
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which requests are allowed.
    private let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    private var currentRequests: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new rate limiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if currentTime > startTime + timeInterval {
            currentRequests = 0
            startTime = currentTime
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to or greater than the maximum requests, deny the request.
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval within which requests are allowed.
    private let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    private var currentRequests: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a new rate limiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if currentTime > startTime + timeInterval {
            currentRequests = 0
            startTime = currentTime
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to or greater than the maximum requests, deny the request.
        return false
    }
}

// MARK: - Usage

// Create a new rate limiter with a maximum of 3 requests per second.
let rateLimiter = RateLimiter(maxRequests: 3, timeInterval: 1.0)

// Allow requests within the defined limits.
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest()) // false
print(rateLimiter.allowRequest())

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval in seconds within which requests are allowed.
    private let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    private var currentRequests: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Public Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if currentTime > startTime + timeInterval {
            currentRequests = 0
            startTime = currentTime
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, deny the request.
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    private let maxRequests: Int
    
    // The time interval in seconds within which requests are allowed.
    private let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    private var currentRequests: Int = 0
    
    // The start time of the current time interval.
    private var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a RateLimiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Public Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if currentTime > startTime + timeInterval {
            currentRequests = 0
            startTime = currentTime
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, deny the request.
        return false
    }
}

// MARK: - Usage

// Create a RateLimiter with a maximum of 5 requests per minute.
let rateLimiter = RateLimiter(maxRequests: 5, timeInterval: 60)

// Allow requests within the defined limits.
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // false

// Wait for 60 seconds to reset the current requests count.
sleep(60)

// Allow requests again after the time interval has passed.
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // true
print(rateLimiter.allowRequest()) // false
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requestCount: Int = 0
    private var lastRequestTime: TimeInterval = 0

    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        let timeSinceLastRequest = currentTime - lastRequestTime

        if timeSinceLastRequest > timeInterval {
            requestCount = 0
        }

        if requestCount < maxRequests {
            requestCount += 1
            lastRequestTime = currentTime
            return true
        }

        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requestCount: Int = 0
    private var lastRequestTime: TimeInterval = 0

    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        let timeSinceLastRequest = currentTime - lastRequestTime

        if timeSinceLastRequest > timeInterval {
            requestCount = 0
        }

        if requestCount < maxRequests {
            requestCount += 1
            lastRequestTime = currentTime
            return true
        }

        return false
    }
}

// Example usage
let rateLimiter = RateLimiter(maxRequests: 10, timeInterval: 60)

for _ in 0..<100 {
    if rateLimiter.allowRequest() {
        print("Request allowed")
    } else {
        print("Request denied")
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    let maxRequests: Int
    
    // The time interval in seconds within which the maximum number of requests is allowed.
    let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    var currentRequests: Int = 0
    
    // The start time of the current time interval.
    var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a rate limiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if Date().timeIntervalSince1970 > startTime + timeInterval {
            currentRequests = 0
            startTime = Date().timeIntervalSince1970
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, do not allow the request.
        return false
    }
}

class RateLimiterTests: XCTestCase {
    
    // MARK: - Properties
    
    // The rate limiter to be tested.
    var rateLimiter: RateLimiter!
    
    // MARK: - Setup and Teardown
    
    // Sets up the test environment before each test.
    override func setUp() {
        super.setUp()
        rateLimiter = RateLimiter(maxRequests: 10, timeInterval: 10)
    }
    
    // Tears down the test environment after each test.
    override func tearDown() {
        rateLimiter = nil
        super.tearDown()
    }
    
    // MARK: - Tests
    
    // Tests if a request can be allowed within the defined limits.
    func testAllowRequest() {
        // Allow the first request.
        XCTAssertTrue(rateLimiter.allowRequest())
        
        // Allow the second request.
        XCTAssertTrue(rateLimiter.allowRequest())
        
        // Wait for the time interval to pass.
        Thread.sleep(forTimeInterval: 10)
        
        // Allow the first request after the time interval has passed.
        XCTAssertTrue(rateLimiter.allowRequest())
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    
    // MARK: - Properties
    
    // The maximum number of requests allowed within the time interval.
    let maxRequests: Int
    
    // The time interval in seconds within which the maximum number of requests is allowed.
    let timeInterval: TimeInterval
    
    // The current number of requests made within the time interval.
    var currentRequests: Int = 0
    
    // The start time of the current time interval.
    var startTime: TimeInterval = 0
    
    // MARK: - Initialization
    
    // Initializes a rate limiter with the specified maximum number of requests and time interval.
    required init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }
    
    // MARK: - Methods
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        // If the current time is greater than the start time plus the time interval, reset the current requests count and start time.
        if Date().timeIntervalSince1970 > startTime + timeInterval {
            currentRequests = 0
            startTime = Date().timeIntervalSince1970
        }
        
        // If the current requests count is less than the maximum requests, allow the request and increment the current requests count.
        if currentRequests < maxRequests {
            currentRequests += 1
            return true
        }
        
        // If the current requests count is equal to the maximum requests, do not allow the request.
        return false
    }
}

// MARK: - RateLimiterTests

class RateLimiterTests: XCTestCase {
    
    // MARK: - Properties
    
    // The rate limiter to be tested.
    var rateLimiter: RateLimiter!
    
    // MARK: - Setup and Teardown
    
    // Sets up the test environment before each test.
    override func setUp() {
        super.setUp()
        rateLimiter = RateLimiter(maxRequests: 10, timeInterval: 10)
    }
    
    // Tears down the test environment after each test.
    override func tearDown() {
        rateLimiter = nil
        super.tearDown()
    }
    
    // MARK: - Tests
    
    // Tests if a request can be allowed within the defined limits.
    func testAllowRequest() {
        // Allow the first request.
        XCTAssertTrue(rateLimiter.allowRequest())
        
        // Allow the second request.
        XCTAssertTrue(rateLimiter.allowRequest())
        
        // Wait for the time interval to pass.
        Thread.sleep(forTimeInterval: 10)
        
        // Allow the first request after the time interval has passed.
        XCTAssertTrue(rateLimiter.allowRequest())
    }
}

// MARK: - Main

// Run the tests.
let tests = RateLimiterTests()
tests.setUp()
tests.testAllowRequest()
tests.tearDown()
```

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return counter
    }
}

class ThreadSafeCounterWithAtomic: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

class ThreadSafeCounterWithAtomic2: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

class ThreadSafeCounterWithAtomic3: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

class ThreadSafeCounterWithAtomic4: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

class ThreadSafeCounterWithAtomic5: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

class ThreadSafeCounterWithAtomic6: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read operations, but not for write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return counter
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic2: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic3: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic4: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic5: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic6: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.modify { $0 += 1 }
    }
    
    func currentValue() -> Int {
        return counterAtomic.load()
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic7: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic<Int>()

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        queue.async {
            self.counter += 1
        }
    }

    func currentValue() -> Int {
        var value: Int
        queue.sync {
            value = self.counter
        }
        return value
    }
}

class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        queue.async {
            self.counter += 1
        }
    }

    func currentValue() -> Int {
        var value: Int
        queue.sync {
            value = self.counter
        }
        return value
    }
}

class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        queue.async {
            self.counter += 1
        }
    }

    func currentValue() -> Int {
        var value: Int
        queue.sync {
            value = self.counter
        }
        return value
    }
}

class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        queue.async {
            self.counter += 1
        }
    }

    func currentValue() -> Int {
        var value: Int
        queue.sync {
            value = self.counter
        }
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        queue.async {
            self.counter += 1
        }
    }

    func currentValue() -> Int {
        var value: Int
        queue.sync {
            value = self.counter
        }
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        queue.async {
            self.counter += 1
        }
    }

    func currentValue() -> Int {
        var value: Int
        queue.sync {
            value = self.counter
        }
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read operations.
class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for write operations.
class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read operations.
class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for write operations.
class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private let queue = DispatchQueue(label: "com.counter.queue")
    private var counter: Int

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private let lock = NSLock()
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private let lock = NSLock()
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private let lock = NSLock()
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounter10: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private let lock = NSLock()
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private let lock = NSLock()
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private let lock = NSLock()
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class ThreadSafeCounter10: ThreadSafeCounterProtocol {
    private var value: Int

    required init(value: Int) {
        self.value = value
    }

    func increment() {
        value += 1
    }

    func currentValue() -> Int {
        return value
    }
}

// Basic number counter

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter10: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter10: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter11: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let currentValue = counter
        lock.unlock()
        return currentValue
    }
}

class ThreadSafeCounterWithAtomic: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

class ThreadSafeCounterWithAtomic2: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

class ThreadSafeCounterWithAtomic3: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

class ThreadSafeCounterWithAtomic4: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

class ThreadSafeCounterWithAtomic5: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

class ThreadSafeCounterWithAtomic6: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let currentValue = counter
        lock.unlock()
        return currentValue
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic2: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic3: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic4: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic5: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic6: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic.increment()
    }
    
    func currentValue() -> Int {
        return counterAtomic.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithAtomic7: ThreadSafeCounterProtocol {
    private var counter: Int
    private let counterAtomic = Atomic(Int.self)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counterAtomic

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterRead: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterWrite: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class Counter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterWithLockRead: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterWithLockWrite: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

class CounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterRead: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounterWrite: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe.
class Counter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterWithLockRead: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounterWithLockWrite: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

// Counter with possibility to increment counter and access current value.
// Not thread-safe.
class CounterWithLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    private var counter: Int
    private let semaphore = DispatchSemaphore(value: 1)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        semaphore.wait()
        counter += 1
        semaphore.signal()
    }
    
    func currentValue() -> Int {
        semaphore

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter10: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter10: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter11: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class UnsafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class UnsafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class UnsafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations, but not for write operations.
class UnsafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class UnsafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations, but not for write operations.
class UnsafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var counter: Int

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()

    required init(value: Int) {
        counter = value
    }

    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }

    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()

    required init(value: Int) {
        counter = value
    }

    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()

    required init(value: Int) {
        counter = value
    }

    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }

    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()

    required init(value: Int) {
        counter = value
    }

    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }

    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read operations, but not for write operations.
class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()

    required init(value: Int) {
        counter = value
    }

    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for write operations, but not for read operations.
class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    private var counter: Int
    private let lock = NSLock()

    required init(value: Int) {
        counter = value
    }

    func increment() {
        lock.lock()
        counter += 1
        lock.unlock()
    }

    func currentValue() -> Int {
        lock.lock()
        let value = counter
        lock.unlock()
        return value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter9: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Not thread-safe for read and write operations.
class ThreadSafeCounter10: ThreadSafeCounterProtocol {
    private var counter: Int

    required init(value: Int) {
        counter = value
    }

    func increment() {
        counter += 1
    }

    func currentValue() -> Int {
        return counter

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterWithReadLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readLock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        readLock.lock()
        defer { readLock.unlock() }
        return counter
    }
}

class ThreadSafeCounterWithWriteLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let writeLock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        writeLock.lock()
        defer { writeLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterWithReadWriteLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readWriteLock = NSRecursiveLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        return counter
    }
}

class ThreadSafeCounterWithReadCondition: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readLock = NSCondition()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        readLock.lock()
        defer { readLock.unlock() }
        return counter
    }
}

class ThreadSafeCounterWithWriteCondition: ThreadSafeCounterProtocol {
    private var counter: Int
    private let writeLock = NSCondition()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        writeLock.lock()
        defer { writeLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

class ThreadSafeCounterWithReadWriteCondition: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readWriteLock = NSCondition()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        return counter
    }
}

class ThreadSafeCounterWithReadSemaphore: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readSemaphore = DispatchSemaphore(value: 1)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        readSemaphore.wait()
        defer { readSemaphore.signal() }
        return counter
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var counter: Int
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterWithReadLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readLock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        readLock.lock()
        defer { readLock.unlock() }
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounterWithWriteLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let writeLock = NSLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        writeLock.lock()
        defer { writeLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithReadWriteLock: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readWriteLock = NSRecursiveLock()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterWithReadCondition: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readLock = NSCondition()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        readLock.lock()
        defer { readLock.unlock() }
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounterWithWriteCondition: ThreadSafeCounterProtocol {
    private var counter: Int
    private let writeLock = NSCondition()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        writeLock.lock()
        defer { writeLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithReadWriteCondition: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readWriteLock = NSCondition()
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        counter += 1
    }
    
    func currentValue() -> Int {
        readWriteLock.lock()
        defer { readWriteLock.unlock() }
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterWithReadSemaphore: ThreadSafeCounterProtocol {
    private var counter: Int
    private let readSemaphore = DispatchSemaphore(value: 1)
    
    required init(value: Int) {
        counter = value
    }
    
    func increment() {
        counter += 1
    }
    
    func currentValue() -> Int {
        readSemaphore.wait()
        defer { readSemaphore.signal() }
        return counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    private var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    private var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .execute()

print(pipeline) // Output: 15
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: Output
    
    required init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> Output {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: Output
    
    required init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .execute()

print(pipeline) // Output: 25
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    
    private var value: T
    
    required init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    
    private var value: T
    
    required init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 10)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .execute()

print(pipeline) // Output: 15
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: Output
    
    required init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> Output {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: Output
    
    required init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .execute()

print(pipeline) // Output: 15
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: T
    private var transformations: [(T) -> T] = []
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newPipeline = Pipeline<U>(value: transform(value))
        transformations.append { transform($0) }
        return newPipeline
    }
    
    func execute() -> T {
        transformations.forEach { value = $0(value) }
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: T
    private var transformations: [(T) -> T] = []
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newPipeline = Pipeline<U>(value: transform(value))
        transformations.append { transform($0) }
        return newPipeline
    }
    
    func execute() -> T {
        transformations.forEach { value = $0(value) }
        return value
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .execute()

print("Final value: \(pipeline)")
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: T
    private var transformations: [(T) -> T] = []
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let pipeline = Pipeline<U>(value: transform(value))
        transformations.append(transform)
        return pipeline
    }
    
    func execute() -> T {
        var currentValue = value
        for transform in transformations {
            currentValue = transform(currentValue)
        }
        return currentValue
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: T
    private var transformations: [(T) -> T] = []
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let pipeline = Pipeline<U>(value: transform(value))
        transformations.append(transform)
        return pipeline
    }
    
    func execute() -> T {
        var currentValue = value
        for transform in transformations {
            currentValue = transform(currentValue)
        }
        return currentValue
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .pipe { $0 / 2 }
    .pipe { $0 * 3 }
    .pipe { $0 + 1 }

let finalValue = pipeline.execute()
print(finalValue) // Output: 15
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    private var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    private var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .pipe { $0 / 2 }
    .pipe { $0 * 3 }
    .pipe { $0 + 1 }
    .execute()

print(pipeline) // Output: 15
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    
    typealias Output = T
    
    private var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    
    typealias Output = T
    
    private var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newValue = transform(value)
        return Pipeline<U>(value: newValue)
    }
    
    func execute() -> T {
        return value
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .execute()

print(pipeline) // Output: 15
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: T
    private var transforms: [(T) -> T] = []
    
    required init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newPipeline = Pipeline<U>(value: transform(value))
        transforms.append(transform)
        return newPipeline
    }
    
    func execute() -> T {
        var currentValue = value
        for transform in transforms {
            currentValue = transform(currentValue)
        }
        return currentValue
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    
    private var value: T
    private var transforms: [(T) -> T] = []
    
    required init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        let newPipeline = Pipeline<U>(value: transform(value))
        transforms.append(transform)
        return newPipeline
    }
    
    func execute() -> T {
        var currentValue = value
        for transform in transforms {
            currentValue = transform(currentValue)
        }
        return currentValue
    }
}

// Example usage:
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .pipe { $0 / 2 }
    .pipe { $0 * 3 }
    .pipe { $0 - 15 }

let finalValue = pipeline.execute()
print(finalValue) // Output: 10
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> T {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<T>: PipelineProtocol {
    typealias Output = T
    var value: T
    
    init(value: T) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (T) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> T {
        return value
    }
}

// Example usage
let initialValue = 10
let pipeline = Pipeline(value: initialValue)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 10 }
    .execute()

print(pipeline) // Output: 15
```

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    
    private var observers = [UUID: (Value) -> Void]()
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty7<

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers()

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty7<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }

    private var observers: [UUID: (Value) -> Void] = [:]

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
    
    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers: [UUID: (Value

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.forEach { $0.value(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value {
        didSet {
            observers.forEach { $0.value(value) }
        }
    }
    private var observers: [UUID: (Value) -> Void] = [:]
    
    required init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        observers[observerID] = observer
        observer(value)
        return observerID
    }
    
    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }
}

// Generic observable property that no

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty2<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty3<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty4<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty5<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty6<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        observer(value)
        return uuid
    }

    func unsubscribe(_ observer: UUID) {
        observers[observer] = nil
    }

    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty7<Value> : ObservablePropertyProtocol {
    var value: Value
    private var observers = [UUID: (Value) -> Void]()

    required init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct Example: ClampedProtocol {
    typealias Value = Int
    @Clamped(wrappedValue: 0, 0...100)
    var value: Value
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Example usage:
struct Example: ClampedProtocol {
    typealias Value = Int
    @Clamped(wrappedValue: 0, 0...100)
    var value: Value
}

var example = Example()
example.value = 150
example.clamp()
print(example.value) // Output: 100
```

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

struct ClampedValue<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

struct ClampedValue2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue2<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

struct ClampedValue3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue3<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

struct ClampedValue4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue4<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

struct ClampedValue5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue5<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

struct ClampedValue6<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue6<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

// Clamped value type.
struct ClampedValue<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

// Clamped value type that conforms to `ClampedProtocol`.
struct ClampedValue2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue2<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

// Clamped value type that conforms to `ClampedProtocol`.
struct ClampedValue3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue3<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

// Clamped value type that conforms to `ClampedProtocol`.
struct ClampedValue4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue4<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

// Clamped value type that conforms to `ClampedProtocol`.
struct ClampedValue5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue5<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

// Clamped value type that conforms to `ClampedProtocol`.
struct ClampedValue6<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue6<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.upperBound), range.lowerBound)
    }
}

// Clamped value type that conforms to `ClampedProtocol`.
struct ClampedValue7<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var value: Value

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.value = wrappedValue
    }

    var projectedValue: ClampedValue7<Value, Protocol> {
        self
    }

    mutating func clamp() {
        value = max(min(value, range.

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty2<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty3<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty4<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty5<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty2<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty3<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty4<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty5<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty6<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty6<Value

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

@propertyWrapper
struct ClampedProperty<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

@propertyWrapper
struct ClampedProperty2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty2<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

@propertyWrapper
struct ClampedProperty3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty3<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

@propertyWrapper
struct ClampedProperty4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty4<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

@propertyWrapper
struct ClampedProperty5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty5<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty2<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty3<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty4<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty5<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = max(min(wrappedValue, range.upperBound), range.lowerBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty6<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty6<Value, Protocol> {
        

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    var wrappedValue: Int
    let range: ClosedRange<Int>

    init(wrappedValue: Int, _ range: ClosedRange<Int>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDouble: ClampedProtocol {
    typealias Value = Double
    var wrappedValue: Double
    let range: ClosedRange<Double>

    init(wrappedValue: Double, _ range: ClosedRange<Double>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedString: ClampedProtocol {
    typealias Value = String
    var wrappedValue: String
    let range: ClosedRange<String>

    init(wrappedValue: String, _ range: ClosedRange<String>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedBool: ClampedProtocol {
    typealias Value = Bool
    var wrappedValue: Bool
    let range: ClosedRange<Bool>

    init(wrappedValue: Bool, _ range: ClosedRange<Bool>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    var wrappedValue: Float
    let range: ClosedRange<Float>

    init(wrappedValue: Float, _ range: ClosedRange<Float>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt: ClampedProtocol {
    typealias Value = UInt
    var wrappedValue: UInt
    let range: ClosedRange<UInt>

    init(wrappedValue: UInt, _ range: ClosedRange<UInt>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt8: ClampedProtocol {
    typealias Value = UInt8
    var wrappedValue: UInt8
    let range: ClosedRange<UInt8>

    init(wrappedValue: UInt8, _ range: ClosedRange<UInt8>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt16: ClampedProtocol {
    typealias Value = UInt16
    var wrappedValue: UInt16
    let range: ClosedRange<UInt16>

    init(wrappedValue: UInt16, _ range: ClosedRange<UInt16>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt32: ClampedProtocol {
    typealias Value = UInt32
    var wrappedValue: UInt32
    let range: ClosedRange<UInt32>

    init(wrappedValue: UInt32, _ range: ClosedRange<UInt32>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt64: ClampedProtocol {
    typealias Value = UInt64
    var wrappedValue: UInt64
    let range: ClosedRange<UInt64>

    init(wrappedValue: UInt64, _ range: ClosedRange<UInt64>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt128: ClampedProtocol {
    typealias Value = UInt128
    var wrappedValue: UInt128
    let range: ClosedRange<UInt128>

    init(wrappedValue: UInt128, _ range: ClosedRange<UInt128>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    var wrappedValue: Int
    let range: ClosedRange<Int>

    init(wrappedValue: Int, _ range: ClosedRange<Int>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDouble: ClampedProtocol {
    typealias Value = Double
    var wrappedValue: Double
    let range: ClosedRange<Double>

    init(wrappedValue: Double, _ range: ClosedRange<Double>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedString: ClampedProtocol {
    typealias Value = String
    var wrappedValue: String
    let range: ClosedRange<String>

    init(wrappedValue: String, _ range: ClosedRange<String>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedBool: ClampedProtocol {
    typealias Value = Bool
    var wrappedValue: Bool
    let range: ClosedRange<Bool>

    init(wrappedValue: Bool, _ range: ClosedRange<Bool>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    var wrappedValue: Float
    let range: ClosedRange<Float>

    init(wrappedValue: Float, _ range: ClosedRange<Float>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt: ClampedProtocol {
    typealias Value = UInt
    var wrappedValue: UInt
    let range: ClosedRange<UInt>

    init(wrappedValue: UInt, _ range: ClosedRange<UInt>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt8: ClampedProtocol {
    typealias Value = UInt8
    var wrappedValue: UInt8
    let range: ClosedRange<UInt8>

    init(wrappedValue: UInt8, _ range: ClosedRange<UInt8>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt16: ClampedProtocol {
    typealias Value = UInt16
    var wrappedValue: UInt16
    let range: ClosedRange<UInt16>

    init(wrappedValue: UInt16, _ range: ClosedRange<UInt16>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt32: ClampedProtocol {
    typealias Value = UInt32
    var wrappedValue: UInt32
    let range: ClosedRange<UInt32>

    init(wrappedValue: UInt32, _ range: ClosedRange<UInt32>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt64: ClampedProtocol {
    typealias Value = UInt64
    var wrappedValue: UInt64
    let range: ClosedRange<UInt64>

    init(wrappedValue: UInt64, _ range: ClosedRange<UInt64>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt128: ClampedProtocol {
    typealias Value = UInt128
    var wrappedValue: UInt128
    let range: ClosedRange<UInt128>

    init(wrappedValue: UInt128, _ range: ClosedRange<UInt128>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt256: ClampedProtocol {
    typealias Value = UInt256
    var wrappedValue: UInt25

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty2<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty3<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty4<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

@propertyWrapper
struct ClampedProperty5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty5<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty2<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty2<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty3<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty3<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty4<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty4<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty5<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty5<Value, Protocol> {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Clamped property wrapper that clamps value within a specified range.
@propertyWrapper
struct ClampedProperty6<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: ClampedProperty6<Value

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Protocol {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    var wrappedValue: Int
    let range: ClosedRange<Int>

    init(wrappedValue: Int, _ range: ClosedRange<Int>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDouble: ClampedProtocol {
    typealias Value = Double
    var wrappedValue: Double
    let range: ClosedRange<Double>

    init(wrappedValue: Double, _ range: ClosedRange<Double>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    var wrappedValue: Float
    let range: ClosedRange<Float>

    init(wrappedValue: Float, _ range: ClosedRange<Float>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedString: ClampedProtocol {
    typealias Value = String
    var wrappedValue: String
    let range: ClosedRange<String>

    init(wrappedValue: String, _ range: ClosedRange<String>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedBool: ClampedProtocol {
    typealias Value = Bool
    var wrappedValue: Bool
    let range: ClosedRange<Bool>

    init(wrappedValue: Bool, _ range: ClosedRange<Bool>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedCharacter: ClampedProtocol {
    typealias Value = Character
    var wrappedValue: Character
    let range: ClosedRange<Character>

    init(wrappedValue: Character, _ range: ClosedRange<Character>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedArray<Element: Comparable>: ClampedProtocol {
    typealias Value = [Element]
    var wrappedValue: [Element]
    let range: ClosedRange<[Element]>

    init(wrappedValue: [Element], _ range: ClosedRange<[Element]>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedSet<Element: Comparable>: ClampedProtocol {
    typealias Value = Set<Element>
    var wrappedValue: Set<Element>
    let range: ClosedRange<Set<Element>>

    init(wrappedValue: Set<Element>, _ range: ClosedRange<Set<Element>>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDictionary<Key: Comparable, Value: Comparable>: ClampedProtocol {
    typealias Value = [Key: Value]
    var wrappedValue: [Key: Value]
    let range: ClosedRange<[Key: Value]>

    init(wrappedValue: [Key: Value], _ range: ClosedRange<[Key: Value]>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedTuple<Element: Comparable>: ClampedProtocol {
    typealias Value = (Element, Element)
    var wrappedValue: (Element, Element)
    let range: ClosedRange<(Element, Element)>

    init(wrappedValue: (Element, Element), _ range: ClosedRange<(Element, Element)>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedOptional<Element: Comparable>: ClampedProtocol {
    typealias Value = Element?
    var wrappedValue: Element?
    let range: ClosedRange<Element?>

    init(wrappedValue: Element?, _ range: ClosedRange<Element?>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Protocol {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    var wrappedValue: Int
    let range: ClosedRange<Int>

    init(wrappedValue: Int, _ range: ClosedRange<Int>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDouble: ClampedProtocol {
    typealias Value = Double
    var wrappedValue: Double
    let range: ClosedRange<Double>

    init(wrappedValue: Double, _ range: ClosedRange<Double>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    var wrappedValue: Float
    let range: ClosedRange<Float>

    init(wrappedValue: Float, _ range: ClosedRange<Float>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedString: ClampedProtocol {
    typealias Value = String
    var wrappedValue: String
    let range: ClosedRange<String>

    init(wrappedValue: String, _ range: ClosedRange<String>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedBool: ClampedProtocol {
    typealias Value = Bool
    var wrappedValue: Bool
    let range: ClosedRange<Bool>

    init(wrappedValue: Bool, _ range: ClosedRange<Bool>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedCharacter: ClampedProtocol {
    typealias Value = Character
    var wrappedValue: Character
    let range: ClosedRange<Character>

    init(wrappedValue: Character, _ range: ClosedRange<Character>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedArray<Element: Comparable>: ClampedProtocol {
    typealias Value = [Element]
    var wrappedValue: [Element]
    let range: ClosedRange<[Element]>

    init(wrappedValue: [Element], _ range: ClosedRange<[Element]>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedSet<Element: Comparable>: ClampedProtocol {
    typealias Value = Set<Element>
    var wrappedValue: Set<Element>
    let range: ClosedRange<Set<Element>>

    init(wrappedValue: Set<Element>, _ range: ClosedRange<Set<Element>>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDictionary<Key: Comparable, Value: Comparable>: ClampedProtocol {
    typealias Value = [Key: Value]
    var wrappedValue: [Key: Value]
    let range: ClosedRange<[Key: Value]>

    init(wrappedValue: [Key: Value], _ range: ClosedRange<[Key: Value]>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedTuple<Element: Comparable>: ClampedProtocol {
    typealias Value = (Element, Element)
    var wrappedValue: (Element, Element)
    let range: ClosedRange<(Element, Element)>

    init(wrappedValue: (Element, Element), _ range: ClosedRange<(Element, Element)>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedOptional<Element: Comparable>: ClampedProtocol {
    typealias Value = Element?
    var wrappedValue: Element?
    let range: ClosedRange<Element?>

    init(wrappedValue: Element?, _ range: ClosedRange<Element?>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedOptionalArray<Element: Comparable>: ClampedProtocol {
    typealias

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Protocol {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    var wrappedValue: Int
    let range: ClosedRange<Int>

    init(wrappedValue: Int, _ range: ClosedRange<Int>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDouble: ClampedProtocol {
    typealias Value = Double
    var wrappedValue: Double
    let range: ClosedRange<Double>

    init(wrappedValue: Double, _ range: ClosedRange<Double>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    var wrappedValue: Float
    let range: ClosedRange<Float>

    init(wrappedValue: Float, _ range: ClosedRange<Float>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedString: ClampedProtocol {
    typealias Value = String
    var wrappedValue: String
    let range: ClosedRange<String>

    init(wrappedValue: String, _ range: ClosedRange<String>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedBool: ClampedProtocol {
    typealias Value = Bool
    var wrappedValue: Bool
    let range: ClosedRange<Bool>

    init(wrappedValue: Bool, _ range: ClosedRange<Bool>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedCharacter: ClampedProtocol {
    typealias Value = Character
    var wrappedValue: Character
    let range: ClosedRange<Character>

    init(wrappedValue: Character, _ range: ClosedRange<Character>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt: ClampedProtocol {
    typealias Value = UInt
    var wrappedValue: UInt
    let range: ClosedRange<UInt>

    init(wrappedValue: UInt, _ range: ClosedRange<UInt>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt8: ClampedProtocol {
    typealias Value = UInt8
    var wrappedValue: UInt8
    let range: ClosedRange<UInt8>

    init(wrappedValue: UInt8, _ range: ClosedRange<UInt8>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt16: ClampedProtocol {
    typealias Value = UInt16
    var wrappedValue: UInt16
    let range: ClosedRange<UInt16>

    init(wrappedValue: UInt16, _ range: ClosedRange<UInt16>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt32: ClampedProtocol {
    typealias Value = UInt32
    var wrappedValue: UInt32
    let range: ClosedRange<UInt32>

    init(wrappedValue: UInt32, _ range: ClosedRange<UInt32>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt64: ClampedProtocol {
    typealias Value = UInt64
    var wrappedValue: UInt64
    let range: ClosedRange<UInt64>

    init(wrappedValue: UInt64, _ range: ClosedRange<UInt64>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Protocol {
        return self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    var wrappedValue: Int
    let range: ClosedRange<Int>

    init(wrappedValue: Int, _ range: ClosedRange<Int>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedDouble: ClampedProtocol {
    typealias Value = Double
    var wrappedValue: Double
    let range: ClosedRange<Double>

    init(wrappedValue: Double, _ range: ClosedRange<Double>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    var wrappedValue: Float
    let range: ClosedRange<Float>

    init(wrappedValue: Float, _ range: ClosedRange<Float>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedString: ClampedProtocol {
    typealias Value = String
    var wrappedValue: String
    let range: ClosedRange<String>

    init(wrappedValue: String, _ range: ClosedRange<String>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedBool: ClampedProtocol {
    typealias Value = Bool
    var wrappedValue: Bool
    let range: ClosedRange<Bool>

    init(wrappedValue: Bool, _ range: ClosedRange<Bool>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedCharacter: ClampedProtocol {
    typealias Value = Character
    var wrappedValue: Character
    let range: ClosedRange<Character>

    init(wrappedValue: Character, _ range: ClosedRange<Character>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt: ClampedProtocol {
    typealias Value = UInt
    var wrappedValue: UInt
    let range: ClosedRange<UInt>

    init(wrappedValue: UInt, _ range: ClosedRange<UInt>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt8: ClampedProtocol {
    typealias Value = UInt8
    var wrappedValue: UInt8
    let range: ClosedRange<UInt8>

    init(wrappedValue: UInt8, _ range: ClosedRange<UInt8>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt16: ClampedProtocol {
    typealias Value = UInt16
    var wrappedValue: UInt16
    let range: ClosedRange<UInt16>

    init(wrappedValue: UInt16, _ range: ClosedRange<UInt16>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt32: ClampedProtocol {
    typealias Value = UInt32
    var wrappedValue: UInt32
    let range: ClosedRange<UInt32>

    init(wrappedValue: UInt32, _ range: ClosedRange<UInt32>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt64: ClampedProtocol {
    typealias Value = UInt64
    var wrappedValue: UInt64
    let range: ClosedRange<UInt64>

    init(wrappedValue: UInt64, _ range: ClosedRange<UInt64>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct ClampedUInt128: ClampedProtocol {
    typealias Value = UInt128
    var wrappedValue: UInt128
    let range: ClosedRange<UInt128>

    init(wrappedValue: UInt1

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

struct ClampedExample {
    @Clamped(wrappedValue: 0, 0...100)
    var value: Int

    init(value: Int) {
        self.value = value
    }

    func printValue() {
        print("Value: \(value)")
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value, Protocol> {
        self
    }

    mutating func clamp() {
        wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
    }
}

// Example of usage:
struct ClampedExample {
    @Clamped(wrappedValue: 0, 0...100)
    var value: Int

    init(value: Int) {
        self.value = value
    }

    func printValue() {
        print("Value: \(value)")
    }
}

let clampedExample = ClampedExample(value: 150)
clampedExample.printValue() // Value: 100
clampedExample.value = -50
clampedExample.printValue() // Value: 0
```

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Protocol {
        return self
    }
}

extension Clamped: ClampedProtocol {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

extension Clamped where Value == Value, Protocol == Clamped<Value, ClampedProtocol> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, ClampedProtocol>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable, Protocol: ClampedProtocol where Protocol.Value == Value>: ClampedProtocol {
    var wrappedValue: Value
    let range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Protocol {
        return self
    }
}

// MARK: - ClampedProtocol

extension Clamped: ClampedProtocol {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, ClampedProtocol>>

extension Clamped where Value == Value, Protocol == Clamped<Value, ClampedProtocol> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, ClampedProtocol>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>>

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>>>

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>>>>

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.init(wrappedValue: wrappedValue, range)
    }
}

// MARK: - Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>>>>>>

extension Clamped where Value == Value, Protocol == Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, Clamped<Value, ClampedProtocol>>>>>>>>>> {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        self
    }

    mutating func set(to newValue: Value) {
        logger(.set, newValue)
        wrappedValue = newValue
    }
}

struct LoggedStruct {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct2 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass2 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct3 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass3 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct4 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass4 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct5 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass5 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct6 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass6 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct7 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass7 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct8 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass8 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct9 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass9 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

struct LoggedStruct10 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

class LoggedClass10 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        self
    }

    mutating func set(to newValue: Value) {
        logger(.set, newValue)
        wrappedValue = newValue
    }
}

// A struct that has a logged property.
struct LoggedStruct {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct2 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass2 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct3 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass3 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct4 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass4 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct5 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass5 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct6 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass6 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct7 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass7 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct8 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass8 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct9 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass9 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct LoggedStruct10 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A class that has a logged property.
class LoggedClass10 {
    @Logged var value: Int

    init(value: Int) {
        self.value = value
    }
}

// A struct that has a logged property.
struct Logged

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        return self
    }

    mutating func set(to value: Value) {
        logger(.set, value)
        wrappedValue = value
    }
}

struct LoggedStruct {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var value: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        return self
    }

    mutating func set(to value: Value) {
        logger(.set, value)
        wrappedValue = value
    }
}

struct LoggedStruct {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var value: Int
}

var struct1 = LoggedStruct()
struct1.value = 100
print(struct1.value)
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        self
    }

    mutating func set(to newValue: Value) {
        logger(.set, newValue)
        wrappedValue = newValue
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        self
    }

    mutating func set(to newValue: Value) {
        logger(.set, newValue)
        wrappedValue = newValue
    }
}

// Example usage
struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

var user = User()
user.age = 25
print(user.age) // Output: 25
```

This example

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct Person {
    @Logged var name: String
    @Logged var age: Int

    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct Person {
    @Logged var name: String
    @Logged var age: Int

    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
}

let person = Person(name: "John", age: 30)
print(person.name) // "John"
print(person.age) // 30

person.name = "Jane"
person.age = 25

print(person.name) // "Jane"
print(person.age) // 25

```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Example usage:
struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

let user = User()
user.age = 25
print(user.age)
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            logger(.set, newValue.wrappedValue)
        }
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            logger(.set, newValue.wrappedValue)
        }
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

var user = User()
user.age = 10
print(user.age)
```

```swift
enum Event

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Example usage:
struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

let user = User()
user.age = 25
print(user.age) // Prints "25"
```

In this

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct LoggedStruct {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var value: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct LoggedStruct {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var value: Int
}

var loggedStruct = LoggedStruct()
print(loggedStruct.value) // 0
loggedStruct.value = 10
print(loggedStruct.value) // 10
```

```swift
enum Event

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        return self
    }

    mutating func set(to value: Value) {
        logger(.set, value)
        wrappedValue = value
    }
}

struct Person {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Self {
        return self
    }

    mutating func set(to value: Value) {
        logger(.set, value)
        wrappedValue = value
    }
}

struct Person {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

var person = Person()
person.age = 10
print(person.age)
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct Person {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var projectedValue: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct Person {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("Event: \(event), Value: \(value)")
    })
    var age: Int
}

var person = Person()
person.age = 10
person.age = 20
person.age = 30
```

```swift
enum Event

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "London")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            do {
                let forecast = try provider.forecast(for: "")
                return .success(city: "", forecast: forecast)
            } catch {
                return .failure(city: "")
            }
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            do {
                let forecast = try provider.forecast(for: "")
                return .success(city: "", forecast: forecast)
            } catch {
                return .failure(city: "")
            }
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            do {
                let forecast = try provider.forecast(for: "")
                return .success(city: "", forecast: forecast)
            } catch {
                return .failure(city: "")
            }
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            do {
                let forecast = try provider.forecast(for: "")
                return .success(city: "", forecast: forecast)
            } catch {
                return .failure(city: "")
            }
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            do {
                let forecast = try provider.forecast(for: "")
                return .success(city: "", forecast: forecast)
            } catch {
                return .failure(city: "")
            }
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            do {
                let forecast = try provider.forecast(for: "")
                return .success(city: "", forecast: forecast)
            } catch {
                return .failure(city: "")
            }
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "Sunny")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .failure(city: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Cloudy")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .success(city: "London", forecast: "Sunny")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

class WeatherApplication2: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

class WeatherApplication3: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

class WeatherApplication4: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

class WeatherApplication5: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

class WeatherApplication6: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication2: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication3: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication4: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication5: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication6: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "", forecast: "")
        case .searchButtonPress:
            return .failure(city: "")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication7: WeatherApplicationProtocol {
    private let provider: WeatherProvider

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            return .success(city: String(character), forecast: "")
        case .keyboardDeleteBackwards:
            return .success(city: "",