return this;
    }

    private ImmutableList<Invokable<?, ?>> getFactoriesToTest() {
      ImmutableList.Builder<Invokable<?, ?>> builder = ImmutableList.builder();
      for (Invokable<?, ?> factory : factories) {
        if (returnTypeToTest.isAssignableFrom(factory.getReturnType().getRawType())) {
          builder.add(factory);
        }
      }
      ImmutableList<Invokable<?, ?>> factoriesToTest = builder.build();

  }

  ImmutableRangeSet(ImmutableList<Range<C>> ranges) {
    this(ranges, /* complement= */ null);
  }

  private ImmutableRangeSet(
      ImmutableList<Range<C>> ranges, @Nullable ImmutableRangeSet<C> complement) {
    this.ranges = ranges;
    this.complement = complement;
  }

  private final transient ImmutableList<Range<C>> ranges;

                  @Override
                  protected List<String> create(String[] elements) {
                    return new StandardImplForwardingList<>(ImmutableList.copyOf(elements));
                  }
                })
            .named("ForwardingList[ImmutableList] with standard implementations")
            .withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_QUERIES)
            .createTestSuite());

   *
   * {@snippet :
   * Lists.cartesianProduct(ImmutableList.of(
   *     ImmutableList.of(1, 2),
   *     ImmutableList.of("A", "B", "C")))
   * }
   *
   * <p>returns a list containing six lists in the following order:
   *
   * <ul>
   *   <li>{@code ImmutableList.of(1, "A")}
   *   <li>{@code ImmutableList.of(1, "B")}
   *   <li>{@code ImmutableList.of(1, "C")}
   *   <li>{@code ImmutableList.of(2, "A")}

   */
  private static ImmutableList<ImmutableList<Class<?>>> allSignatures(Class<?> predicateType) {
    ImmutableSet.Builder<ImmutableList<Class<?>>> allOverloads = ImmutableSet.builder();
    // The first two are for the overloads that don't take formatting args, e.g.
    // checkArgument(boolean) and checkArgument(boolean, Object)
    allOverloads.add(ImmutableList.<Class<?>>of(predicateType));

   */
  private static ImmutableList<ImmutableList<Class<?>>> allSignatures(Class<?> predicateType) {
    ImmutableSet.Builder<ImmutableList<Class<?>>> allOverloads = ImmutableSet.builder();
    // The first two are for the overloads that don't take formatting args, e.g.
    // checkArgument(boolean) and checkArgument(boolean, Object)
    allOverloads.add(ImmutableList.<Class<?>>of(predicateType));

    EquivalenceTester.of(Equivalence.equals().<String>pairwise())
        .addEquivalenceGroup(ImmutableList.<String>of())
        .addEquivalenceGroup(ImmutableList.of("a"))
        .addEquivalenceGroup(ImmutableList.of("b"))
        .addEquivalenceGroup(ImmutableList.of("a", "b"), ImmutableList.of("a", "b"))
        .test();
  }

  public void testPairwiseEquivalent_equals() {
    new EqualsTester()

    EquivalenceTester.of(Equivalence.equals().<String>pairwise())
        .addEquivalenceGroup(ImmutableList.<String>of())
        .addEquivalenceGroup(ImmutableList.of("a"))
        .addEquivalenceGroup(ImmutableList.of("b"))
        .addEquivalenceGroup(ImmutableList.of("a", "b"), ImmutableList.of("a", "b"))
        .test();
  }

  public void testPairwiseEquivalent_equals() {
    new EqualsTester()

                    .build());
        FileAttribute<ImmutableList<AclEntry>> attribute =
            new FileAttribute<ImmutableList<AclEntry>>() {
              @Override
              public String name() {
                return "acl:acl";
              }

              @Override
              public ImmutableList<AclEntry> value() {
                return acl;
              }
            };

 *
 * @author Louis Wasserman
 */
@GwtIncompatible
final class JdkBackedImmutableSet<E> extends IndexedImmutableSet<E> {
  private final Set<?> delegate;
  private final ImmutableList<E> delegateList;

  JdkBackedImmutableSet(Set<?> delegate, ImmutableList<E> delegateList) {
    this.delegate = delegate;
    this.delegateList = delegateList;
  }

  @Override
  E get(int index) {
    return delegateList.get(index);
  }