val flowControlListener = connectionListener as? FlowControlListener ?: FlowControlListener.None
    val http2Connection =
      Http2Connection
        .Builder(client = true, taskRunner)
        .socket(socket, route.address.url.host)
        .listener(this)
        .pingIntervalMillis(pingIntervalMillis)
        .flowControlListener(flowControlListener)
        .build()

    fun pingIntervalMillis(pingIntervalMillis: Int) =
      apply {
        this.pingIntervalMillis = pingIntervalMillis
      }

    fun flowControlListener(flowControlListener: FlowControlListener) =
      apply {
        this.flowControlListener = flowControlListener
      }

    fun build(): Http2Connection = Http2Connection(this)
  }

  /**