* the given class. If the object being tested is {@code null} this predicate evaluates to {@code
   * false}.
   *
   * <p>If you want to filter an {@code Iterable} to narrow its type, consider using {@link
   * com.google.common.collect.Iterables#filter(Iterable, Class)} in preference.
   *
   * <p><b>Warning:</b> contrary to the typical assumptions about predicates (as documented at

    Some tests need reflective access to the internals of these packages. It is only the
    tests themselves and not the code being tested that needs that access, though there's no
    obvious way to ensure that.

    We could consider arranging things so that only the tests we know need this would get
    the add-opens. Right now that doesn't seem worth the effort, though.
    -->
    <test.add.opens>
      --add-opens java.base/java.lang=ALL-UNNAMED

    tests themselves and not the code being tested that needs that access, though there's no
    obvious way to ensure that.

    We could consider arranging things so that only the tests we know need this would get
    the add-opens. Right now that doesn't seem worth the effort, though.
    -->
    <test.add.opens>
      --add-opens java.base/java.lang=ALL-UNNAMED

    // Trickled element was after index to begin with, no adjustment needed.
    return changes;
  }

  private @Nullable MoveDesc<E> fillHole(int index, E toTrickle) {
    Heap heap = heapForIndex(index);
    // We consider elementData(index) a "hole", and we want to fill it
    // with the last element of the heap, toTrickle.
    // Since the last element of the heap is from the bottom level, we

            if (channel.getErrorRate() > 0.1) {
                log.warn("High error rate on channel {}: {}", 
                    channel.getChannelId(), channel.getErrorRate());
                // Consider removing channel
            }
        }
    }
    
    private void discoverInterfaces() {
        if (!multiChannelEnabled) return;
        

  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

  internal val flowControlListener: FlowControlListener = builder.flowControlListener

   * cache afterward).
   */
  @GwtIncompatible // QueuingRemovalListener

  @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.
  public void testRemovalNotification_clear_basher() throws InterruptedException {
    // If a clear() happens close to the end of computation, one of two things should happen:

 * who can't use Java 8, or who want an API more focused than {@code CompletableFuture}. (If you
 * need to adapt between {@code CompletableFuture} and {@code ListenableFuture}, consider <a
 * href="https://github.com/lukas-krecan/future-converter">Future Converter</a>.)
 *
 * <h3>Extension</h3>
 *
 * If you want a class like {@code FluentFuture} but with extra methods, we recommend declaring your

      return Optional.of(list.get(list.size() - 1));
    }
    Iterator<E> iterator = iterable.iterator();
    if (!iterator.hasNext()) {
      return Optional.absent();
    }

    /*
     * TODO(kevinb): consider whether this "optimization" is worthwhile. Users with SortedSets tend
     * to know they are SortedSets and probably would not call this method.
     */
    if (iterable instanceof SortedSet) {

    /** Executor service for concurrent search operations across multiple searchers */
    protected ExecutorService executorService;

    /** Size of the window for rank fusion processing, determines how many results to consider */
    protected int windowSize;

    /** Set of available searcher names that can be used for search processing */
    protected Set<String> availableSearcherNameSet;

    /**