Connection,
  ExchangeCodec.Carrier,
  Lockable {
  private var http2Connection: Http2Connection? = null

  // These properties are guarded by `this`.

  /**
   * If true, no new exchanges can be created on this connection. It is necessary to set this to
   * true when removing a connection from the pool; otherwise a racing caller might get it from the

 *     [chunked][newChunkedSource] or [unknown][newUnknownLengthSource].
 *  6. Read from and close that source.
 *
 * Exchanges that do not have a request body may skip creating and closing the request body.
 * Exchanges that do not have a response body can call
 * [newFixedLengthSource(0)][newFixedLengthSource] and may skip reading and closing that source.
 */
class Http1ExchangeCodec(

    return connect
  }

  /**
   * Returns the connection already attached to the call if it's eligible for a new exchange.
   *
   * If the call's connection exists and is eligible for another exchange, it is returned. If it
   * exists but cannot be used for another exchange, it is closed and this returns null.
   */
  private fun planReuseCallConnection(): ReusePlan? {

     */
    int CAP_LARGE_READX = 0x4000;
    /**
     * Large write operations are supported capability.
     */
    int CAP_LARGE_WRITEX = 0x8000;
    /**
     * Extended security exchanges are supported capability.
     */
    int CAP_EXTENDED_SECURITY = 0x80000000;

    // file attribute encoding
    /**
     * File is marked read-only
     */
    int ATTR_READONLY = 0x01;
    /**

    exchange: Exchange,
    requestDone: Boolean = false,
    responseDone: Boolean = false,
    socketSourceDone: Boolean = false,
    socketSinkDone: Boolean = false,
    e: IOException?,
  ): IOException? {
    if (exchange != this.exchange) return e // This exchange was detached violently!

    var allStreamsDone = false
    var callDone = false
    withLock {
      if (
        requestDone && requestBodyOpen ||

			Optional:    true,
			Type:        "on|off",
		},
		config.HelpKV{
			Key:         target.AmqpInternal,
			Description: "set to 'on' for exchange to be not used directly by publishers, but only when bound to other exchanges",
			Optional:    true,
			Type:        "on|off",
		},
		config.HelpKV{
			Key:         target.AmqpAutoDeleted,

	// code, which we now have in `lastReq`. Exchange it for a JWT id_token.
	q := lastReq.URL.Query()
	// fmt.Printf("lastReq.URL: %#v q: %#v\n", lastReq.URL, q)
	code := q.Get("code")
	oauth2Token, err := oauth2Config.Exchange(ctx, code)
	if err != nil {
		return "", fmt.Errorf("unable to exchange code for id token: %v", err)
	}

  }

  fun cancel() {
    codec.cancel()
  }

  /**
   * Revoke this exchange's access to streams. This is necessary when a follow-up request is
   * required but the preceding exchange hasn't completed yet.
   */
  fun detachWithViolence() {
    codec.cancel()
    call.messageDone(
      exchange = this,
      requestDone = true,
      responseDone = true,
      socketSinkDone = true,

enabling the HTTP/2 use by the HTTP client broke programs
connecting to servers with buggy HTTP/2 implementations.
These kinds of changes are unavoidable and
[permitted by the Go 1 compatibility rules](/doc/go1compat).
Even so, Go provides a mechanism called GODEBUG to
reduce the impact such changes have on Go developers
using newer toolchains to compile old code.

A GODEBUG setting is a `key=value` pair

 */
class RealInterceptorChain(
  internal val call: RealCall,
  private val interceptors: List<Interceptor>,
  private val index: Int,
  internal val exchange: Exchange?,
  internal val request: Request,
  internal val connectTimeoutMillis: Int,
  internal val readTimeoutMillis: Int,
  internal val writeTimeoutMillis: Int,
  override val authenticator: Authenticator,
  override val cache: Cache?,