assertNotInstantiable(new TypeToken<Set<EmptyEnum>>() {});
  }

  public void testHashSet() {
    assertFreshInstance(new TypeToken<HashSet<String>>() {});
  }

  public void testLinkedHashSet() {
    assertFreshInstance(new TypeToken<LinkedHashSet<String>>() {});
  }

  public void testTreeSet() {
    assertFreshInstance(new TypeToken<TreeSet<String>>() {});
  }