* the backing object, but relies on {@code Object}'s implementation. This is necessary to preserve
 * the symmetry of {@code equals}. Custom definitions of equality are usually based on an interface,
 * such as {@code Set} or {@code List}, so that the implementation of {@code equals} can cast the
 * object being tested for equality to the custom interface. {@code ForwardingObject} implements no

  }

  public void testAwaitClear() {
    WeakReference<Object> ref = new WeakReference<>(new Object());
    GcFinalization.awaitClear(ref);
    assertThat(ref.get()).isNull();
  }

  public void testAwaitDone_finalizationPredicate() {
    WeakHashMap<Object, Object> map = new WeakHashMap<>();
    map.put(new Object(), Boolean.TRUE);
    GcFinalization.awaitDone(
        new FinalizationPredicate() {

  static <K extends @Nullable Object, V extends @Nullable Object>
      Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return Maps.newHashMapWithExpectedSize(expectedSize);
  }

  /**
   * Returns the platform preferred implementation of an insertion ordered map based on a hash
   * table.
   */
  static <K extends @Nullable Object, V extends @Nullable Object>

        }
    }

    public void test_setSerializer() {
        // ## Arrange ##
        final ResultData resultData = new ResultData();
        final Function<Object, byte[]> serializer = new Function<Object, byte[]>() {
            @Override
            public byte[] apply(Object t) {
                return t.toString().getBytes();
            }
        };

        // ## Act ##
        resultData.setSerializer(serializer);

  static Subscriber create(EventBus bus, Object listener, Method method) {
    return isDeclaredThreadSafe(method)
        ? new Subscriber(bus, listener, method)
        : new SynchronizedSubscriber(bus, listener, method);
  }

  /** The event bus this subscriber belongs to. */
  @Weak private final EventBus bus;

  /** The object with the subscriber method. */
  @VisibleForTesting final Object target;

  /** Subscriber method. */

   *
   * <p>Equivalent to {@link #binarySearch(List, Object, Comparator, KeyPresentBehavior,
   * KeyAbsentBehavior)} using {@link Lists#transform(List, Function) Lists.transform(list,
   * keyFunction)}.
   */
  public static <E extends @Nullable Object, K extends @Nullable Object> int binarySearch(
      List<E> list,
      Function<? super E, K> keyFunction,

   * Object[])} comparator when comparing a value outside the set of values it can compare.
   * Extending {@link ClassCastException} may seem odd, but it is required.
   */
  static final class IncomparableValueException extends ClassCastException {
    final Object value;

    IncomparableValueException(Object value) {
      super("Cannot compare value: " + value);

     * It verifies that a new DfsReferral object is initialized with its 'next'
     * property pointing to itself.
     */
    @Test
    void testDefaultConstructor() {
        // Given
        DfsReferral referral = new DfsReferral();

        // When / Then
        assertNotNull(referral, "The DfsReferral object should not be null.");

              + " called");
    }

    public <A extends @Nullable Object> void a(A a) {
      fail("Method with parameter <A extends @Nullable Object> should not be called");
    }

    public <A extends B, B extends @Nullable Object> void b(A a) {
      fail(
          "Method with parameter <A extends B> where <B extends @Nullable Object> should not be"

 * @since 10.0
 */
public class DeadEvent {

  private final Object source;
  private final Object event;

  /**
   * Creates a new DeadEvent.
   *
   * @param source object broadcasting the DeadEvent (generally the {@link EventBus}).
   * @param event the event that could not be delivered.
   */
  public DeadEvent(Object source, Object event) {
    this.source = checkNotNull(source);