this.concurrencyLevels = Sets.newLinkedHashSet(concurrencyLevels);
    return this;
  }

  CacheBuilderFactory withInitialCapacities(Set<Integer> initialCapacities) {
    this.initialCapacities = Sets.newLinkedHashSet(initialCapacities);
    return this;
  }

  CacheBuilderFactory withMaximumSizes(Set<Integer> maximumSizes) {
    this.maximumSizes = Sets.newLinkedHashSet(maximumSizes);
    return this;
  }

    this.concurrencyLevels = Sets.newLinkedHashSet(concurrencyLevels);
    return this;
  }

  CacheBuilderFactory withInitialCapacities(Set<Integer> initialCapacities) {
    this.initialCapacities = Sets.newLinkedHashSet(initialCapacities);
    return this;
  }

  CacheBuilderFactory withMaximumSizes(Set<Integer> maximumSizes) {
    this.maximumSizes = Sets.newLinkedHashSet(maximumSizes);
    return this;
  }

    E first = elements.next();
    if (!elements.hasNext()) {
      // TODO: Remove "ImmutableSet.<E>" when eclipse bug is fixed.
      return ImmutableSet.<E>of(first);
    }

    Set<E> delegate = Sets.newLinkedHashSet();
    delegate.add(checkNotNull(first));
    do {
      delegate.add(checkNotNull(elements.next()));
    } while (elements.hasNext());

    return unsafeDelegate(delegate);
  }

                new TestStringSetGenerator() {
                  @Override
                  protected Set<String> create(String[] elements) {
                    return new StandardImplForwardingSet<>(Sets.newLinkedHashSet(asList(elements)));
                  }
                })
            .named("ForwardingSet[LinkedHashSet] with standard implementations")
            .withFeatures(
                CollectionSize.ANY,

                new TestStringSetGenerator() {
                  @Override
                  protected Set<String> create(String[] elements) {
                    return new StandardImplForwardingSet<>(Sets.newLinkedHashSet(asList(elements)));
                  }
                })
            .named("ForwardingSet[LinkedHashSet] with standard implementations")
            .withFeatures(
                CollectionSize.ANY,

   * other if the {@link DummyProxy} instance that created the proxies are equal.
   */
  final <T> T newProxy(TypeToken<T> interfaceType) {
    Set<Class<?>> interfaceClasses = Sets.newLinkedHashSet();
    interfaceClasses.addAll(interfaceType.getTypes().interfaces().rawTypes());
    // Make the proxy serializable to work with SerializableTester
    interfaceClasses.add(Serializable.class);
    Object dummy =

   * other if the {@link DummyProxy} instance that created the proxies are equal.
   */
  final <T> T newProxy(TypeToken<T> interfaceType) {
    Set<Class<?>> interfaceClasses = Sets.newLinkedHashSet();
    interfaceClasses.addAll(interfaceType.getTypes().interfaces().rawTypes());
    // Make the proxy serializable to work with SerializableTester
    interfaceClasses.add(Serializable.class);
    Object dummy =

  }

  /**
   * Returns the platform preferred set implementation that preserves insertion order when used only
   * for insertions.
   */
  static <E> Set<E> preservesInsertionOrderOnAddsSet() {
    return Sets.newLinkedHashSet();
  }

  static <T> T[] newArray(T[] reference, int length) {
    T[] empty = reference.length == 0 ? reference : Arrays.copyOf(reference, 0);
    return Arrays.copyOf(empty, length);
  }