override fun addHandshakeCompletedListener(listener: HandshakeCompletedListener) {
    delegate!!.addHandshakeCompletedListener(listener)
  }

  override fun removeHandshakeCompletedListener(listener: HandshakeCompletedListener) {
    delegate!!.removeHandshakeCompletedListener(listener)
  }

  @Throws(IOException::class)
  override fun startHandshake() {
    delegate!!.startHandshake()
  }