static final Object EVENT = new Object();

  abstract H createSubscriber();

  private @Nullable H subscriber;

  H getSubscriber() {
    return subscriber;
  }

  @Override
  protected void setUp() throws Exception {
    subscriber = createSubscriber();
    EventBus bus = new EventBus();
    bus.register(subscriber);
    bus.post(EVENT);
  }

  @Override

    }
  }

  public void testOverriddenAndAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenAndAnnotatedInSubclassEvents).contains(EVENT);
  }

  public void testOverriddenNotAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenInSubclassEvents).contains(EVENT);
  }

  @Override
  SubClass createSubscriber() {
    return new SubClass();
  }

    }
  }

  public void testOverriddenAndAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenAndAnnotatedInSubclassEvents).contains(EVENT);
  }

  public void testOverriddenNotAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenInSubclassEvents).contains(EVENT);
  }

  @Override
  SubClass createSubscriber() {
    return new SubClass();
  }

    @SuppressWarnings("UnnecessaryLambda") // Must be a fixed singleton object
    private static final Supplier<@Nullable Void> SUCCESSFULLY_COMPUTED =
        () -> {
          throw new IllegalStateException(); // Should never get called.
        };

    private volatile Supplier<T> delegate;
    // "value" does not need to be volatile; visibility piggy-backs on volatile read of "delegate".
    private @Nullable T value;

 * Contrast the method above to:
 *
 * <ul>
 *   <li>methods whose return type is a type variable but which can never return {@code null},
 *       typically because the type forbids nullable type arguments: For example, {@code
 *       ImmutableList.get} returns {@code E}, but that value is never {@code null}. (Accordingly,
 *       {@code ImmutableList} is declared to forbid {@code ImmutableList<@Nullable String>}.)

 * Contrast the method above to:
 *
 * <ul>
 *   <li>methods whose return type is a type variable but which can never return {@code null},
 *       typically because the type forbids nullable type arguments: For example, {@code
 *       ImmutableList.get} returns {@code E}, but that value is never {@code null}. (Accordingly,
 *       {@code ImmutableList} is declared to forbid {@code ImmutableList<@Nullable String>}.)

						// re-init the watch channel.
						goto outerLoop
					}
					for _, event := range watchResp.Events {
						isCreateEvent := event.IsModify() || event.IsCreate()
						isDeleteEvent := event.Type == etcd.EventTypeDelete

						switch {
						case isCreateEvent:
							ch <- iamWatchEvent{
								isCreated: true,
								keyPath:   string(event.Kv.Key),
							}
						case isDeleteEvent:
							ch <- iamWatchEvent{

     */
    @Nonnull
    String getArtifactId();

    /**
     * Returns the classifier of the artifact.
     *
     * @return the classifier or an empty string if none, never {@code null}
     */
    @Nonnull
    String getClassifier();

    /**
     * {@return the specific version, range of versions, or meta-version of the artifact}.

 *
 * @since 4.0.0
 */
@Experimental
public interface SettingsBuilderResult extends Result<SettingsBuilderRequest> {

    /**
     * Gets the assembled settings.
     *
     * @return the assembled settings, never {@code null}
     */
    @Nonnull
    Settings getEffectiveSettings();

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity

 *
 * @since 4.0.0
 */
@Experimental
public interface ToolchainsBuilderResult extends Result<ToolchainsBuilderRequest> {
    /**
     * Gets the assembled toolchains.
     *
     * @return the assembled toolchains, never {@code null}
     */
    @Nonnull
    PersistedToolchains getEffectiveToolchains();

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity