return this.node.equals(((Pred<?>) that).node);
        } else {
          return false;
        }
      }

      @Override
      public int hashCode() {
        // Adding the class hashCode to avoid a clash with Succ instances.
        return Pred.class.hashCode() + node.hashCode();
      }
    }

    static final class Succ<N> extends NodeConnection<N> {
      Succ(N node) {
        super(node);
      }

        @Override
        public void execute(Runnable command) {}
      };
    }

    @Override
    protected void run() throws Exception {}
  }

  public void testStopWhileStarting_runNotCalled() throws Exception {
    CountDownLatch started = new CountDownLatch(1);
    FakeService service =
        new FakeService() {
          @Override
          protected void startUp() throws Exception {

   * @since 15.0
   */
  @Override
  public final void awaitRunning() {
    delegate.awaitRunning();
  }

  /**
   * @since 28.0
   */
  @Override
  public final void awaitRunning(Duration timeout) throws TimeoutException {
    Service.super.awaitRunning(timeout);
  }

  /**
   * @since 15.0
   */
  @Override
  public final void awaitRunning(long timeout, TimeUnit unit) throws TimeoutException {

 *
 * <p>An instance may be called concurrently by multiple threads to process different entries.
 * Implementations of this interface should avoid performing blocking calls or synchronizing on
 * shared resources.
 *
 * @param <K> the most general type of keys this listener can listen for; for example {@code Object}
 *     if any key is acceptable

import org.jspecify.annotations.Nullable;

/**
 * A {@link Collection} whose contents will never change, and which offers a few additional
 * guarantees detailed below.
 *
 * <p><b>Warning:</b> avoid <i>direct</i> usage of {@link ImmutableCollection} as a type (just as
 * with {@link Collection} itself). Prefer subtypes such as {@link ImmutableSet} or {@link

   * in the list under test matches what is expected.
   */
  @Override
  protected void expectContents(Collection<E> expectedCollection) {
    List<E> expectedList = copyToList(expectedCollection);
    // Avoid expectEquals() here to delay reason manufacture until necessary.
    if (getList().size() != expectedList.size()) {

        : SetTestSuiteBuilder.using(keySetGenerator);
  }

  /**
   * To avoid infinite recursion, test suites with these marker features won't have derived suites
   * created for them.
   */
  enum NoRecurse implements Feature<@Nullable Void> {
    SUBMAP,
    DESCENDING;

    @Override
    public Set<Feature<? super @Nullable Void>> getImpliedFeatures() {
      return emptySet();
    }
  }

  /**

    loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BASIC);
    client.networkInterceptors().add(loggingInterceptor);
    ```

    **Warning:** Avoid `Level.HEADERS` and `Level.BODY` in production because
    they could leak passwords and other authentication credentials to insecure
    logs.

 *  **WebSocket API now uses `RequestBody` and `ResponseBody` for messages.**

    checkNotNull(safeChars); // eager for GWT.
    // Avoid any misunderstandings about the behavior of this escaper
    if (safeChars.matches(".*[0-9A-Za-z].*")) {
      throw new IllegalArgumentException(
          "Alphanumeric characters are always 'safe' and should not be explicitly specified");
    }
    safeChars += "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    // Avoid ambiguous parameters. Safe characters are never modified so if

      int size = size();
      checkPositionIndex(index, size);
      return size - index;
    }

    @Override
    public void add(int index, @ParametricNullness T element) {
      forwardList.add(reversePosition(index), element);
    }

    @Override
    public void clear() {
      forwardList.clear();
    }

    @Override
    @ParametricNullness
    public T remove(int index) {