assertTrue(collection.equals(collection));

    assertFalse(multimap.keySet() instanceof SortedSet);
    assertFalse(multimap.asMap() instanceof SortedMap);
  }

  public void testNewMultimapValueCollectionMatchesNavigableSet() {
    Supplier<TreeSet<Integer>> factory = new SortedSetSupplier();
    Map<Color, Collection<Integer>> map = Maps.newEnumMap(Color.class);