}

        public void setThrowRuntimeException(boolean throwException) {
            this.throwRuntimeException = throwException;
        }
    }

    private static class TestUrlQueueService implements UrlQueueService<OpenSearchUrlQueue> {
        @Override
        public void delete(String sessionId) {
            // Do nothing in test
        }

        @Override
        public void deleteAll() {

        assertTrue("Test should complete quickly (duration: " + duration + "ms)", duration < 1000);
    }

    // Fast mock implementations to minimize overhead

    private static class FastMockIndexUpdateCallback implements IndexUpdateCallback {
        @Override
        public long getExecuteTime() {
            return 100L;
        }

        @Override
        public long getDocumentSize() {
            return 10L;

  }

  // TODO(cpovirk): Just use addSuppressed+getSuppressed now that we can rely on it.
  /** Suppressor that records suppressions. */
  private static class TestSuppressor implements Closer.Suppressor {

    private final List<Suppression> suppressions = new ArrayList<>();

    @Override
    public void suppress(Closeable closeable, Throwable thrown, Throwable suppressed) {

        assertNotNull(ignored);
        assertEquals(testRequest, ignored);
    }

    /**
     * Test implementation of Request interface
     */
    private static class TestRequest implements Request<TestResponse> {
        private TestResponse response;
        private boolean ignoreDisconnect = false;
        private int tid = 0;
        private SMBSigningDigest digest;
        private long mid = 0;

    static final GetCheckedTypeValidator BEST_VALIDATOR = getBestValidator();

    @J2ObjCIncompatible // ClassValue
    enum ClassValueValidator implements GetCheckedTypeValidator {
      INSTANCE;

      /*
       * Static final fields are presumed to be fastest, based on our experience with
       * UnsignedBytesBenchmark. TODO(cpovirk): benchmark this
       */

 *
 * @author Chris Povirk
 * @author Jared Levy
 * @author George van den Driessche
 * @author Louis Wasserman
 */
@GwtCompatible
@NullMarked
public abstract class TestStringBiMapGenerator implements TestBiMapGenerator<String, String> {

  @Override
  public SampleElements<Entry<String, String>> samples() {
    return new SampleElements<>(
        mapEntry("one", "January"),
        mapEntry("two", "February"),

    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(new MapMaker());
  }

  @GwtIncompatible // threads
  static final class DelayingIdentityLoader<T> implements Function<T, T> {
    private final CountDownLatch delayLatch;

    DelayingIdentityLoader(CountDownLatch delayLatch) {
      this.delayLatch = delayLatch;
    }

    @CanIgnoreReturnValue // Sure, why not?

 *
 * @author Louis Wasserman
 */
final class UnmodifiableSortedMultiset<E extends @Nullable Object> extends UnmodifiableMultiset<E>
    implements SortedMultiset<E> {
  UnmodifiableSortedMultiset(SortedMultiset<E> delegate) {
    super(delegate);
  }

  @Override
  protected SortedMultiset<E> delegate() {
    return (SortedMultiset<E>) super.delegate();

 *
 * @author Chris Povirk
 * @author Jared Levy
 * @author George van den Driessche
 * @author Louis Wasserman
 */
@GwtCompatible
@NullMarked
public abstract class TestStringBiMapGenerator implements TestBiMapGenerator<String, String> {

  @Override
  public SampleElements<Entry<String, String>> samples() {
    return new SampleElements<>(
        mapEntry("one", "January"),
        mapEntry("two", "February"),

 * termination.
 *
 * @author Chris Povirk
 * @since 14.0
 */
@CheckReturnValue
@GwtIncompatible
public abstract class AbstractListeningExecutorService extends AbstractExecutorService
    implements ListeningExecutorService {
  /** Constructor for use by subclasses. */
  public AbstractListeningExecutorService() {}

  /**
   * @since 19.0 (present with return type {@code ListenableFutureTask} since 14.0)
   */