this.withLock {
      if (closed) throw IOException("closed")
      var flags = FLAG_NONE
      if (outFinished) flags = flags or FLAG_END_STREAM
      dataFrame(streamId, flags, source, byteCount)
    }
  }

  @Throws(IOException::class)
  fun dataFrame(
    streamId: Int,
    flags: Int,
    buffer: Buffer?,
    byteCount: Int,
  ) {
    frameHeader(
      streamId = streamId,

    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()

 * names by broadcasting a query, directing queries to a server such as
 * Samba or WINS. NetBIOS is currently the primary networking layer for
 * providing name service, datagram service, and session service to the
 * Microsoft Windows platform. A NetBIOS name can be 15 characters long
 * and hosts usually registers several names on the network. From a
 * Windows command prompt you can see

 * names by broadcasting a query, directing queries to a server such as
 * Samba or WINS. NetBIOS is currently the primary networking layer for
 * providing name service, datagram service, and session service to the
 * Microsoft Windows platform. A NetBIOS name can be 15 characters long
 * and hosts usually registers several names on the network. From a
 * Windows command prompt you can see