immutableEntry("tree", 0),
            immutableEntry("google", 6),
            immutableEntry("google", 2))
        .inOrder();
  }

  public void testOrderedValues() {
    TreeMultimap<@Nullable String, @Nullable Integer> multimap = createPopulate();
    assertThat(multimap.values()).containsExactly(7, 3, 1, null, 0, 6, 2).inOrder();
  }

  public void testComparator() {