}

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester, ImmutableSortedAsList
  public void testAsListReturnTypeAndSerialization() {
    ImmutableSet<String> set = ImmutableSortedSet.of("a", "e", "i", "o", "u");
    ImmutableList<String> list = set.asList();
    assertTrue(list instanceof ImmutableSortedAsList);
    ImmutableList<String> copy = SerializableTester.reserializeAndAssert(list);

    assertEquals(ImmutableList.of("a", "e", "i", "o", "u"), list);
    assertSame(list, ImmutableList.copyOf(set));
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester, ImmutableSortedAsList
  public void testAsListReturnTypeAndSerialization() {
    ImmutableSet<String> set = ImmutableSortedSet.of("a", "e", "i", "o", "u");
    ImmutableList<String> list = set.asList();

    } catch (ClassCastException e) {
      return -1;
    }
    return (position >= 0) ? position : -1;
  }

  @Override
  ImmutableList<E> createAsList() {
    return (size() <= 1) ? elements : new ImmutableSortedAsList<E>(this, elements);
  }

  @Override
  ImmutableSortedSet<E> createDescendingSet() {
    Comparator<? super E> reversedOrder = Collections.reverseOrder(comparator);
    return isEmpty()