}

  @Override
  protected Map<String, Collection<Integer>> makeEmptyMap() {
    return ImmutableSetMultimap.<String, Integer>of().asMap();
  }

  @Override
  protected Map<String, Collection<Integer>> makePopulatedMap() {
    Multimap<String, Integer> delegate = HashMultimap.create();
    populate(delegate);
    return ImmutableSetMultimap.copyOf(delegate).asMap();
  }

                return wrap((SetMultimap<?, ?>) delegate);
              }
            });
  }

  public void testEquals() {
    SetMultimap<Integer, String> map1 = ImmutableSetMultimap.of(1, "one");
    SetMultimap<Integer, String> map2 = ImmutableSetMultimap.of(2, "two");
    new EqualsTester()
        .addEqualityGroup(map1, wrap(map1), wrap(map1))
        .addEqualityGroup(map2, wrap(map2))
        .testEquals();
  }

  // TODO: test ImmutableMultimap builder and factory methods

  public void testCopyOf() {
    ImmutableSetMultimap<String, String> setMultimap = ImmutableSetMultimap.of("k1", "v1");
    ImmutableMultimap<String, String> setMultimapCopy = ImmutableMultimap.copyOf(setMultimap);
    assertSame(
        "copyOf(ImmutableSetMultimap) should not create a new instance",
        setMultimap,
        setMultimapCopy);

  // TODO: test ImmutableMultimap builder and factory methods

  public void testCopyOf() {
    ImmutableSetMultimap<String, String> setMultimap = ImmutableSetMultimap.of("k1", "v1");
    ImmutableMultimap<String, String> setMultimapCopy = ImmutableMultimap.copyOf(setMultimap);
    assertSame(
        "copyOf(ImmutableSetMultimap) should not create a new instance",
        setMultimap,
        setMultimapCopy);

  }

  public void testImmutableListMultimap() {
    doHasAllFauxveridesTest(ImmutableListMultimap.class, ImmutableMultimap.class);
  }

  public void testImmutableSetMultimap() {
    doHasAllFauxveridesTest(ImmutableSetMultimap.class, ImmutableMultimap.class);
  }

  public void testImmutableSortedMap() {
    doHasAllFauxveridesTest(ImmutableSortedMap.class, ImmutableMap.class);
  }

  public void testImmutableSortedSet() {

  }

  public void testImmutableListMultimap() {
    doHasAllFauxveridesTest(ImmutableListMultimap.class, ImmutableMultimap.class);
  }

  public void testImmutableSetMultimap() {
    doHasAllFauxveridesTest(ImmutableSetMultimap.class, ImmutableMultimap.class);
  }

  public void testImmutableSortedMap() {
    doHasAllFauxveridesTest(ImmutableSortedMap.class, ImmutableMap.class);
  }

  public void testImmutableSortedSet() {