الگوی Delegation در کاتلین

fun main(){
  val audioP = AudioPlayer()
  val videoP = VideoPlayer(audioP)

  audioP.stop()
  videoP.play()
}

interface BasePlayer{
  fun play()
  fun stop()
  fun next()
}

class AudioPlayer(): BasePlayer{

  override fun play() {
    println("Playing...")
  }

  override fun stop() {
    println("Stopping...")
  }

  override fun next() {
    println("Next")
  }
}

class VideoPlayer(b: BasePlayer): BasePlayer by b{
  var isFullScreen: Boolean = false
}
            

          ...

interface BasePlayer{
  val codecType: String
          ...
}

class AudioPlayer: BasePlayer{
  override val codecType: String = "MPEG-2"
          ...
}

class VideoPlayer(b: BasePlayer): BasePlayer by b {
  override val codecType: String = "H265"
          ...
}