@Test
void testCreateWithNewValuesUsingValueMapperWhichUsesBothKeysAndValues() {

    ImmutableMap<Integer, Integer> baseMap = ImmutableMap.of(
            3, 1,
            7, 2,
            14, 3,
            1, 4);
    ImmutableMap<Integer, Integer> expected = ImmutableMap.of(
            3, 4,
            7, 9,
            14, 17,
            1, 5);
    ImmutableMap<Integer, Integer> actual = ImmutableMapFactory.
            createWithNewValues(baseMap, Integer::sum);
    Assertions.assertEquals(expected, actual);
}