assertMapEquals(map, "one", 1, "two", 2, "three", 3, "four", 4, "five", 5);
    assertMapEquals(map.inverse(), 1, "one", 2, "two", 3, "three", 4, "four", 5, "five");
  }

  public void testBuilderReuse() {
    Builder<String, Integer> builder = new Builder<>();
    ImmutableBiMap<String, Integer> mapOne = builder.put("one", 1).put("two", 2).build();

        ImmutableSortedMap.<String, Integer>naturalOrder().putAll(toPut).putAll(moreToPut).build();
    assertMapEquals(map, "five", 5, "four", 4, "one", 1, "three", 3, "two", 2);
  }

  public void testBuilderReuse() {
    Builder<String, Integer> builder = ImmutableSortedMap.naturalOrder();
    ImmutableSortedMap<String, Integer> mapOne = builder.put("one", 1).put("two", 2).build();