@SuppressWarnings("UseCollectionConstructor") // test of factory method
    LinkedHashMap<Integer, Integer> map = Maps.newLinkedHashMap();
    assertEquals(emptyMap(), map);
  }

  public void testLinkedHashMapWithInitialMap() {
    Map<String, String> map =
        new LinkedHashMap<String, String>(
            ImmutableMap.of(
                "Hello", "World",
                "first", "second",