* close the socket as soon as this frame has been written; otherwise the peer stays open until
   * explicitly closed.
   */
  fun truncateLastFrame(length: Int): Http2Writer {
    val lastFrame = outFrames.removeAt(outFrames.size - 1)
    require(length < bytesOut.size - lastFrame.start)

    // Move everything from bytesOut into a new buffer.
    val fullBuffer = Buffer()
    bytesOut.read(fullBuffer, bytesOut.size)

      override fun runOnce(): Long = closeConnections(System.nanoTime())
    }

  /**
   * Holding the lock of the connection being added or removed when mutating this, and check its
   * [RealConnection.noNewExchanges] property. This defends against races where a connection is
   * simultaneously adopted and removed.
   */
  private val connections = ConcurrentLinkedQueue<RealConnection>()

  init {

      } else {
        readyQueues.remove(taskQueue)
      }
    }

    if (coordinatorWaiting) {
      backend.coordinatorNotify(this@TaskRunner)
    } else {
      startAnotherThread()
    }
  }

  private fun beforeRun(task: Task) {
    assertLockHeld()

    task.nextExecuteNanoTime = -1L
    val queue = task.queue!!
    queue.futureTasks.remove(task)
    readyQueues.remove(queue)

  private fun startNextTask(): SerialTask? {
    taskRunner.assertLockHeld()

    val index = serialTaskQueue.indexOfFirst { it.isReady() }
    if (index == -1) return null

    val nextTask = serialTaskQueue.removeAt(index)
    currentTask = nextTask
    contextSwitchCount++
    nextTask.start()
    return nextTask
  }

  private interface SerialTask {
    /** Returns true if this task is ready to start. */

     * to ["a", "b", ""].
     */
    private fun pop() {
      val removed = encodedPathSegments.removeAt(encodedPathSegments.size - 1)

      // Make sure the path ends with a '/' by either adding an empty string or clearing a segment.
      if (removed.isEmpty() && encodedPathSegments.isNotEmpty()) {
        encodedPathSegments[encodedPathSegments.size - 1] = ""
      } else {

    val calls = connection.calls
    val index = calls.indexOfFirst { it.get() == this@RealCall }
    check(index != -1)

    calls.removeAt(index)
    this.connection = null

    if (calls.isEmpty()) {
      connection.idleAtNs = System.nanoTime()
      if (connectionPool.connectionBecameIdle(connection)) {
        return connection.socket()
      }
    }

    return null
  }

    PushObserver,
    Lockable {
    val events = mutableListOf<Any>()

    @Synchronized fun takeEvent(): Any {
      while (events.isEmpty()) {
        wait()
      }
      return events.removeAt(0)
    }

    @Synchronized override fun onRequest(
      streamId: Int,
      requestHeaders: List<Header>,
    ): Boolean {
      assertThat(streamId).isEqualTo(2)

        // First apply limited inference (child elements) - this removes matching child groupId/version
        hasChanges |= trimParentElementLimited(context, root, parentElement);

        // Only remove parent elements if the parent is in the same reactor (not external)
        if (isParentInReactor(parentElement, pomMap, context)) {
            // Remove parent groupId if child has no explicit groupId

   * otherwise, this method returns false.
   */
  boolean remove(K key, long value) {
    return map.remove(key, value);
  }

  /**
   * Atomically remove {@code key} from the map iff its associated value is 0.
   *
   * @since 20.0
   */
  @CanIgnoreReturnValue
  public boolean removeIfZero(K key) {
    return remove(key, 0);
  }

  /**

   * removeFrom.removeIf(predicate)} instead.
   *
   * @param removeFrom the iterable to (potentially) remove elements from
   * @param predicate a predicate that determines whether an element should be removed
   * @return {@code true} if any elements were removed from the iterable
   * @throws UnsupportedOperationException if the iterable does not support {@code remove()}.
   * @since 2.0
   */