/** Initialized in [callStart]. */
  private var callStackTrace: Any? = null

  /** Finds an exchange to send the next request and receive the next response. */
  private var exchangeFinder: ExchangeFinder? = null

  var connection: RealConnection? = null
    private set
  private var timeoutEarlyExit = false

  /**

  private var intervalPingsSent = 0L
  private var intervalPongsReceived = 0L
  private var degradedPingsSent = 0L
  private var degradedPongsReceived = 0L
  private var awaitPingsSent = 0L
  private var awaitPongsReceived = 0L

  /** Consider this connection to be unhealthy if a degraded pong isn't received by this time. */
  private var degradedPongDeadlineNs = 0L

                override fun close() {
                  responseClosed = true
                }
              }.buffer()
          },
        ).build()

    var responseClosed = false
    var canceled = false
    var afterCallbackOnResponse: () -> Unit = {}

    override fun cancel() {
      canceled = true
    }

    override fun enqueue(responseCallback: Callback) {

    @Throws(IOException::class)
    override fun writeTo(sink: BufferedSink) {
      val forwardingSink =
        object : ForwardingSink(sink) {
          private var totalBytesWritten: Long = 0
          private var completed = false

          override fun write(
            source: Buffer,
            byteCount: Long,
          ) {
            super.write(source, byteCount)

#
#       Busybox and similar reduced shells will NOT work, because this script
#       requires all of these POSIX shell features:
#         * functions;
#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
#         * compound commands having a testable exit status, especially «case»;
#         * various built-in commands including «command», «set», and «ulimit».
#

    object : ForwardingSource(delegate.source) {
      private var closed = false

      override fun close() {
        if (closed) return
        try {
          super.close()
        } finally {
          closedLatch.countDown()
        }
      }
    }.buffer()

  override val sink: BufferedSink =
    object : ForwardingSink(delegate.sink) {
      private var closed = false

      override fun close() {

      }
    }
  }
  return result
}

@Throws(EOFException::class)
private fun Buffer.readChallengeHeader(result: MutableList<Challenge>) {
  var peek: String? = null

  while (true) {
    // Read a scheme name for this challenge if we don't have one already.
    if (peek == null) {
      skipCommasAndWhitespace()
      peek = readToken()

  // Guarded by this.
  override lateinit var bytes: ByteString
  override lateinit var exceptionBytes: ByteString

  private var readFailure: IOException? = null

  @Throws(IOException::class)
  private fun readTheList() {
    var publicSuffixListBytes: ByteString?
    var publicSuffixExceptionListBytes: ByteString?

    try {

  private val noContextTakeover: Boolean,
) : Closeable {
  private var closed = false
  private var receivedCloseFrame = false

  // Stateful data about the current frame.
  private var opcode = 0
  private var frameLength = 0L
  private var isFinalFrame = false
  private var isControlFrame = false
  private var readingCompressedMessage = false

  private val controlFrameBuffer = Buffer()

   * ```
   */
  var constructed: Boolean,
  /** Length of the message in bytes, or -1L if its length is unknown at the time of encoding. */
  var length: Long,
) {
  val isEndOfData: Boolean
    get() = tagClass == TAG_CLASS_UNIVERSAL && tag == TAG_END_OF_CONTENTS

  // Avoid Long.hashCode(long) which isn't available on Android 5.
  override fun hashCode(): Int {
    var result = 0
    result = 31 * result + tagClass