}

  public void testNewEnumSet_collection() {
    Set<SomeEnum> set = ImmutableSet.of(SomeEnum.B, SomeEnum.C);
    assertEquals(set, newEnumSet(set, SomeEnum.class));
  }

  public void testNewEnumSet_iterable() {
    Set<SomeEnum> set = ImmutableSet.of(SomeEnum.A, SomeEnum.B, SomeEnum.C);
    assertEquals(set, newEnumSet(unmodifiableIterable(set), SomeEnum.class));
  }

  public void testNewHashSetEmpty() {