@CanIgnoreReturnValue
  @SuppressWarnings("deprecation") // TODO(b/134064106): design an alternative to no-arg check()
  public final Ordered containsExactly() {
    return check().about(iterableEntries()).that(checkNotNull(actual).entries()).containsExactly();
  }
@Test
  public void containsExactlyVarargFailureExtra() {
    ImmutableMultimap<Integer, String> expected =
        ImmutableMultimap.of(3, "one", 3, "six", 3, "two", 4, "five", 4, "four");
    ListMultimap<Integer, String> actual = LinkedListMultimap.create(expected);
    actual.put(4, "nine");
    actual.put(5, "eight");

    expectFailureWhenTestingThat(actual)
        .containsExactly(3, "one", 3, "six", 3, "two", 4, "five", 4, "four");
    assertFailureKeys("unexpected", "---", "expected", "but was");
    assertFailureValue("unexpected", "{4=[nine], 5=[eight]}");
  }