}

  @Override
  public void testValues() {
    BiMap<String, Integer> map = create();
    Set<Integer> values = map.values();
    assertTrue(values instanceof SynchronizedSet);
    assertSame(mutex, ((SynchronizedSet<?>) values).mutex);
  }

  }

  public void testKeySet() {
    Map<String, Integer> map = create();
    Set<String> keySet = map.keySet();
    assertTrue(keySet instanceof SynchronizedSet);
    assertSame(mutex, ((SynchronizedSet<?>) keySet).mutex);
  }

  public void testValues() {
    Map<String, Integer> map = create();
    Collection<Integer> values = map.values();

  }

  public void testKeySet() {
    Map<String, Integer> map = create();
    Set<String> keySet = map.keySet();
    assertTrue(keySet instanceof SynchronizedSet);
    assertSame(mutex, ((SynchronizedSet<?>) keySet).mutex);
  }

  public void testValues() {
    Map<String, Integer> map = create();
    Collection<Integer> values = map.values();

  }

  @Override
  public void testValues() {
    BiMap<String, Integer> map = create();
    Set<Integer> values = map.values();
    assertTrue(values instanceof SynchronizedSet);
    assertSame(mutex, ((SynchronizedSet<?>) values).mutex);
  }

  @VisibleForTesting
  static <E extends @Nullable Object> Set<E> set(Set<E> set, @CheckForNull Object mutex) {
    return new SynchronizedSet<>(set, mutex);
  }

  static class SynchronizedSet<E extends @Nullable Object> extends SynchronizedCollection<E>
      implements Set<E> {

    SynchronizedSet(Set<E> delegate, @CheckForNull Object mutex) {
      super(delegate, mutex);
    }

    @Override
    Set<E> delegate() {

      }
    },
    SynchronizedSetImpl {
      @Override
      public <E extends Comparable<E>> Set<E> create(Collection<E> contents) {
        return Collections.synchronizedSet(new HashSet<E>(contents));
      }
    },
    ImmutableSetImpl {
      @Override
      public <E extends Comparable<E>> Set<E> create(Collection<E> contents) {
        return ImmutableSet.copyOf(contents);
      }

      }
    },
    SynchronizedSetImpl {
      @Override
      public <E extends Comparable<E>> Set<E> create(Collection<E> contents) {
        return Collections.synchronizedSet(new HashSet<E>(contents));
      }
    },
    ImmutableSetImpl {
      @Override
      public <E extends Comparable<E>> Set<E> create(Collection<E> contents) {
        return ImmutableSet.copyOf(contents);
      }

              numSuccessfulSetCalls.incrementAndGet();
            }
            awaitUnchecked(barrier);
            return null;
          }
        };
    final Set<Object> finalResults = Collections.synchronizedSet(Sets.newIdentityHashSet());
    Runnable collectResultsRunnable =
        new Runnable() {
          @Override
          public void run() {
            try {

              numSuccessfulSetCalls.incrementAndGet();
            }
            awaitUnchecked(barrier);
            return null;
          }
        };
    final Set<Object> finalResults = Collections.synchronizedSet(Sets.newIdentityHashSet());
    Runnable collectResultsRunnable =
        new Runnable() {
          @Override
          public void run() {
            try {