}
  }

  private fun newChunkedSink(): Sink {
    check(state == STATE_OPEN_REQUEST_BODY) { "state: $state" }
    state = STATE_WRITING_REQUEST_BODY
    return ChunkedSink()
  }

  private fun newKnownLengthSink(): Sink {
    check(state == STATE_OPEN_REQUEST_BODY) { "state: $state" }
    state = STATE_WRITING_REQUEST_BODY
    return KnownLengthSink()
  }