@Throws(IOException::class)
  private fun readPriority(
    handler: Handler,
    length: Int,
    flags: Int,
    streamId: Int,
  ) {
    if (length != 5) throw IOException("TYPE_PRIORITY length: $length != 5")
    if (streamId == 0) throw IOException("TYPE_PRIORITY streamId == 0")
    readPriority(handler, streamId)
  }

  @Throws(IOException::class)
  private fun readPriority(
    handler: Handler,