@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 containsExactlyVarargWithNull() {
    Multimap<Integer, String> listMultimap =
        LinkedListMultimap.create(ImmutableListMultimap.of(1, "one", 3, "six", 3, "two"));
    listMultimap.put(4, null);

    assertThat(listMultimap).containsExactly(1, "one", 3, "six", 3, "two", 4, null);
  }