protected void verify(List<Integer> elements) {
        assertEquals(new HashSet<>(elements), multimap.get("foo"));
      }
    }.test();
  }

  @GwtIncompatible // unreasonably slow
  public void testEntriesIteration() {
    Set<Entry<String, Integer>> set =
        new LinkedHashSet<>(
            asList(
                immutableEntry("foo", 2),
                immutableEntry("foo", 3),