/** Constructor for use by subclasses. */
  protected ForwardingNavigableSet() {}

  @Override
  protected abstract NavigableSet<E> delegate();

  @Override
  @CheckForNull
  public E lower(@ParametricNullness E e) {
    return delegate().lower(e);
  }

  /**
   * A sensible definition of {@link #lower} in terms of the {@code descendingIterator} method of

  private static class SimpleForwardingSortedMap<K, V> extends ForwardingSortedMap<K, V> {
    final SortedMap<K, V> delegate;

    SimpleForwardingSortedMap(SortedMap<K, V> delegate) {
      this.delegate = delegate;
    }

    @Override
    protected SortedMap<K, V> delegate() {
      return delegate;
    }
  }

  public ForwardingSortedMapImplementsMapTest() {
    super(true, true, true, true, true);
  }

    return ImmutableMultimap.<String, Integer>of().asMap();
  }

  @Override
  protected Map<String, Collection<Integer>> makePopulatedMap() {
    Multimap<String, Integer> delegate = HashMultimap.create();
    populate(delegate);
    return ImmutableMultimap.copyOf(delegate).asMap();
  }

        .asMap();
  }

  @Override
  protected Map<String, Collection<Integer>> makePopulatedMap() {
    ListMultimap<String, Integer> delegate = ArrayListMultimap.create();
    populate(delegate);
    return Multimaps.transformValues(delegate, Functions.<Integer>identity()).asMap();
  }

final class SingletonImmutableList<E> extends ForwardingImmutableList<E> {

  final transient List<E> delegate;
  // This reference is used both by the custom field serializer, and by the
  // GWT compiler to infer the elements of the lists that needs to be
  // serialized.
  E element;

  SingletonImmutableList(E element) {
    this.delegate = singletonList(checkNotNull(element));
    this.element = element;
  }

  @Override

  @Override
  protected abstract Queue<E> delegate();

  @CanIgnoreReturnValue // TODO(cpovirk): Consider removing this?
  @Override
  public boolean offer(@ParametricNullness E o) {
    return delegate().offer(o);
  }

  @CanIgnoreReturnValue // TODO(cpovirk): Consider removing this?
  @Override
  @CheckForNull
  public E poll() {
    return delegate().poll();
  }

  @CanIgnoreReturnValue
  @Override

  protected ForwardingSortedSetMultimap() {}

  @Override
  protected abstract SortedSetMultimap<K, V> delegate();

  @Override
  public SortedSet<V> get(@ParametricNullness K key) {
    return delegate().get(key);
  }

  @Override
  public SortedSet<V> removeAll(@CheckForNull Object key) {
    return delegate().removeAll(key);
  }

  @Override

class DirFileEntryAdapterIterator extends FileEntryAdapterIterator {

    /**
     * @param parent
     * @param delegate
     * @param filter
     */
    public DirFileEntryAdapterIterator ( SmbResource parent, CloseableIterator<FileEntry> delegate, ResourceFilter filter ) {
        super(parent, delegate, filter);
    }


    /**
     * @param fe
     * @return
     * @throws MalformedURLException
     */

  @Override
  protected abstract SortedSet<E> delegate();

  @Override
  @CheckForNull
  public Comparator<? super E> comparator() {
    return delegate().comparator();
  }

  @Override
  @ParametricNullness
  public E first() {
    return delegate().first();
  }

  @Override
  public SortedSet<E> headSet(@ParametricNullness E toElement) {
    return delegate().headSet(toElement);
  }

  @Override

  @Override
  protected abstract ConcurrentMap<K, V> delegate();

  @CanIgnoreReturnValue
  @Override
  @CheckForNull
  public V putIfAbsent(K key, V value) {
    return delegate().putIfAbsent(key, value);
  }

  @CanIgnoreReturnValue
  @Override
  public boolean remove(@CheckForNull Object key, @CheckForNull Object value) {
    return delegate().remove(key, value);
  }

  @CanIgnoreReturnValue
  @Override