ImmutableMultiset<String> multiset =
        new ImmutableMultiset.Builder<String>().addAll(iterator).build();
    assertEquals(HashMultiset.create(asList("a", "b", "a", "c")), multiset);
  }

  public void testBuilderAddCopies() {
    ImmutableMultiset<String> multiset =
        new ImmutableMultiset.Builder<String>()
            .addCopies("a", 2)
            .addCopies("b", 3)
            .addCopies("c", 0)
            .build();

    ImmutableMultiset<String> multiset =
        new ImmutableMultiset.Builder<String>().addAll(iterator).build();
    assertEquals(HashMultiset.create(asList("a", "b", "a", "c")), multiset);
  }

  public void testBuilderAddCopies() {
    ImmutableMultiset<String> multiset =
        new ImmutableMultiset.Builder<String>()
            .addCopies("a", 2)
            .addCopies("b", 3)
            .addCopies("c", 0)
            .build();