Http2Writer(out, true).goAway(lastGoodStreamId, errorCode, debugData)
    return out
  }

  private fun sendDataFrame(data: Buffer): Buffer {
    val out = Buffer()
    Http2Writer(out, true).dataFrame(expectedStreamId, FLAG_NONE, data, data.size.toInt())
    return out
  }

  private fun windowUpdate(windowSizeIncrement: Long): Buffer {
    val out = Buffer()