@Test public void mapT2() { Tuple5<Integer, String, Integer, Integer, Integer> base = Tuples.of(100, "Foo", 300, 400, 500); Tuple2<?,?> mapped = base.mapT2(String::length); assertThat(mapped).isNotSameAs(base) .hasSize(5) .containsExactly(base.getT1(), 3, base.getT3(), base.getT4(), base.getT5()); }