public void testCopyOf_shortcut_immutableMultiset() {
    Collection<String> c = ImmutableSortedMultiset.of("a", "b", "c");
    assertThat(ImmutableSortedMultiset.copyOf(c)).isSameInstanceAs(c);
  }

  public void testForEachEntry() {
    ImmutableSortedMultiset<String> multiset =
        ImmutableSortedMultiset.<String>naturalOrder().add("a").add("b").add("a").add("c").build();
    List<Multiset.Entry<String>> entries = new ArrayList<>();