Type safe wrapper around a .plist file

Config.swift

// MARK: - ConfigKey

protocol ConfigKey {
  associatedtype Data
  static var key: String { get }
}

// MARK: - Config

/// A type safe wrapper around Config.plist
enum Config {
  private static let config: NSDictionary = NSDictionary(contentsOfFile: Bundle.main.path(forResource: "Config", ofType: "plist")!)!
  static func retrieve<K: ConfigKey>(_ key: K.Type) -> K.Data { config.object(forKey: K.key) as! K.Data }
}