Feature Toggle implementation in Swift

Feature.swift

import Foundation

enum Feature: String, CaseIterable {
    case newThing
    case otherThing
    
    var isEnabled: Bool {
        return UserDefaults.standard.bool(forKey: "feature-\(self.rawValue)")
    }
    
    func enable() {
        UserDefaults.standard.set(true, forKey: "feature-\(self.rawValue)")
    }
    
    func disable() {
        UserDefaults.standard.set(false, forKey: "feature-\(self.rawValue)")
    }
    
    func toggle() {
        if self.isEnabled {
            disable()
        } else {
            enable()
        }
    }
    
    static func enableAll() {
        for feature in self.allCases {
            feature.enable()
        }
    }
    
    static func disableAll() {
        for feature in self.allCases {
            feature.disable()
        }
    }
}

/// Examples how to use Feature toggle implementation above.
func exampleUsage() {
    if Feature.newThing.isEnabled {
        print("New Thing is enabled")
    }
    
    Feature.otherThing.enable()
    Feature.enableAll()
    Feature.disableAll()
    Feature.newThing.toggle()
}