* proxy server can issue an auth challenge and then close the connection.
   *
   * @return the next plan to attempt, or null if no further attempt should be made either because
   *     we've successfully connected or because no further attempts should be made.
   */
  @Throws(IOException::class)
  internal fun connectTunnel(): ConnectResult {
    val nextTunnelRequest =
      createTunnel()

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  // (and thus are never queued) and do not detract from the
  // capacity made available to other priority levels.  A value of
  // `"Limited"` means that (a) requests of this priority level
  // _are_ subject to limits and (b) some of the server's limited
  // capacity is made available exclusively to this priority level.
  // Required.
  // +unionDiscriminator
  optional string type = 1;

  // (and thus are never queued) and do not detract from the
  // capacity made available to other priority levels.  A value of
  // `"Limited"` means that (a) requests of this priority level
  // _are_ subject to limits and (b) some of the server's limited
  // capacity is made available exclusively to this priority level.
  // Required.
  // +unionDiscriminator
  optional string type = 1;

     * canceled, even if this plan is canceled.
     */
    fun retry(): Plan?
  }

  /**
   * What to do once a plan has executed.
   *
   * If [nextPlan] is not-null, another attempt should be made by following it. If [throwable] is
   * non-null, it should be reported to the user should all further attempts fail.
   *
   * The two values are independent: results can contain both (recoverable error), neither

This platform does not provide special support for a particular kind of automation. This is the responsibility of other platforms.

It is made up of 3 architecture modules:

      typeHintStack[typeHintStack.size - 1] = value
    }

  /** Names leading to the current location in the ASN.1 document. */
  private val path = mutableListOf<String>()

  /**
   * False unless we made a recursive call to [write] at the current stack frame. The explicit box
   * adapter can clear this to synthesize non-constructed values that are embedded in octet strings.
   */
  var constructed = false

  fun write(

/**
 *
 * Note: uses @Typed to limit the types it is available for injection to just ModelProcessor.
 *
 * This is because the ModelProcessor interface extends ModelLocator and ModelReader. If we
 * made this component available under all its interfaces then it could end up being injected
 * into itself leading to a stack overflow.
 *
 * A side effect of using @Typed is that it translates to explicit bindings in the container.

    return result;
  }

  /*
   * Memory visibility of these fields. There are two cases to consider.
   *
   * 1. visibility of the writes to these fields to Fire.run:
   *
   * The initial write to delegateRef is made definitely visible via the semantics of
   * addListener/SES.schedule. The later racy write in cancel() is not guaranteed to be observed,
   * however that is fine since the correctness is based on the atomic state in our base class. The

    // Impact the coordinator if we inserted at the front.
    return insertAt == 0
  }

  /**
   * Schedules immediate execution of [Task.tryCancel] on all currently-enqueued tasks. These calls
   * will not be made until any currently-executing task has completed. Tasks that return true will
   * be removed from the execution schedule.
   */
  fun cancelAll() {
    lock.assertNotHeld()

    taskRunner.lock.withLock {