@GwtIncompatible // doesn't build without explicit type parameters on build() methods
  public void testGenerics() {
    ListMultimap<String, Integer> unusedA = MultimapBuilder.hashKeys().arrayListValues().build();
    SortedSetMultimap<String, Integer> unusedB =
        MultimapBuilder.linkedHashKeys().treeSetValues().build();
    SetMultimap<String, Integer> unusedC =
        MultimapBuilder.treeKeys(String.CASE_INSENSITIVE_ORDER).hashSetValues().build();

      extends UnmodifiableSetMultimap<K, V> implements SortedSetMultimap<K, V> {
    UnmodifiableSortedSetMultimap(SortedSetMultimap<K, V> delegate) {
      super(delegate);
    }

    @Override
    public SortedSetMultimap<K, V> delegate() {
      return (SortedSetMultimap<K, V>) super.delegate();
    }

    @Override

      extends UnmodifiableSetMultimap<K, V> implements SortedSetMultimap<K, V> {
    UnmodifiableSortedSetMultimap(SortedSetMultimap<K, V> delegate) {
      super(delegate);
    }

    @Override
    public SortedSetMultimap<K, V> delegate() {
      return (SortedSetMultimap<K, V>) super.delegate();
    }

    @Override

  }

  /** Test that creating one TreeMultimap from a SortedSetMultimap uses natural ordering. */
  public void testCreateFromSortedSetMultimap() {
    SortedSetMultimap<Double, Double> tree = TreeMultimap.create(KEY_COMPARATOR, VALUE_COMPARATOR);
    tree.put(1.0, 2.0);
    tree.put(2.0, 3.0);
    tree.put(3.0, 4.0);
    tree.put(4.0, 5.0);

    SortedSetMultimap<Double, Double> sorted = Multimaps.unmodifiableSortedSetMultimap(tree);