TestSet<String> inner = new TestSet<>(new HashSet<String>(), MUTEX);
                Set<String> outer = Synchronized.set(inner, inner.mutex);
                Collections.addAll(outer, elements);
                return outer;
              }
            })
        .named("Synchronized.set")
        .withFeatures(
            CollectionFeature.GENERAL_PURPOSE,

public class SynchronizedDequeTest extends TestCase {

  protected Deque<String> create() {
    TestDeque<String> inner = new TestDeque<>();
    Deque<String> outer = Synchronized.deque(inner, inner.mutex);
    outer.add("foo"); // necessary because we try to remove elements later on
    return outer;
  }

  private static final class TestDeque<E> implements Deque<E> {
    private final Deque<E> delegate = Lists.newLinkedList();

    NavigableMap<K, V> innermost =
        new SafeTreeMap<>((Comparator<? super K>) Ordering.natural().nullsFirst());
    TestMap<K, V> inner = new TestMap<>(innermost, mutex);
    NavigableMap<K, V> outer = Synchronized.navigableMap(inner, mutex);
    return outer;
  }

  static class TestEntry<K, V> extends ForwardingMapEntry<K, V> implements Serializable {
    private final Entry<K, V> delegate;
    private final Object mutex;

                    SetMultimap<String, String> outer =
                        Synchronized.setMultimap(inner, inner.mutex);
                    for (Entry<String, String> entry : entries) {
                      outer.put(entry.getKey(), entry.getValue());
                    }
                    return outer;
                  }
                })
            .named("Synchronized.setMultimap")

    NavigableMap<K, V> innermost =
        new SafeTreeMap<>((Comparator<? super K>) Ordering.natural().nullsFirst());
    TestMap<K, V> inner = new TestMap<>(innermost, mutex);
    NavigableMap<K, V> outer = Synchronized.navigableMap(inner, mutex);
    return outer;
  }

  static class TestEntry<K, V> extends ForwardingMapEntry<K, V> implements Serializable {
    private final Entry<K, V> delegate;
    private final Object mutex;

    return suite;
  }

  @Override
  protected <K, V> BiMap<K, V> create() {
    TestBiMap<K, V> inner = new TestBiMap<>(HashBiMap.<K, V>create(), mutex);
    BiMap<K, V> outer = Synchronized.biMap(inner, mutex);
    return outer;
  }

  public static final class SynchronizedHashBiMapGenerator extends TestStringBiMapGenerator {
    @Override
    protected BiMap<String, String> create(Entry<String, String>[] entries) {

    return suite;
  }

  @Override
  protected <K, V> BiMap<K, V> create() {
    TestBiMap<K, V> inner = new TestBiMap<>(HashBiMap.<K, V>create(), mutex);
    BiMap<K, V> outer = Synchronized.biMap(inner, mutex);
    return outer;
  }

  public static final class SynchronizedHashBiMapGenerator extends TestStringBiMapGenerator {
    @Override
    protected BiMap<String, String> create(Entry<String, String>[] entries) {

  public final Object mutex = new Integer(1); // something Serializable

  protected <K, V> Map<K, V> create() {
    TestMap<K, V> inner = new TestMap<>(new HashMap<K, V>(), mutex);
    Map<K, V> outer = Synchronized.map(inner, mutex);
    return outer;
  }

  static class TestMap<K, V> extends ForwardingMap<K, V> implements Serializable {
    public final Object mutex;
    private Map<K, V> delegate;

  public final Object mutex = new Integer(1); // something Serializable

  protected <K, V> Map<K, V> create() {
    TestMap<K, V> inner = new TestMap<>(new HashMap<K, V>(), mutex);
    Map<K, V> outer = Synchronized.map(inner, mutex);
    return outer;
  }

  static class TestMap<K, V> extends ForwardingMap<K, V> implements Serializable {
    public final Object mutex;
    private Map<K, V> delegate;

    assertEquals("FooBar{}", toTest);
  }

  @GwtIncompatible // Class names are obfuscated in GWT
  public void testToStringHelper_localInnerClass() {
    // Local inner classes have names ending like "Outer.$1Inner"
    class LocalInnerClass {}
    String toTest = MoreObjects.toStringHelper(new LocalInnerClass()).toString();
    assertEquals("LocalInnerClass{}", toTest);
  }