@Test
 public void shouldCurry() {
   final Function5<Object, Object, Object, Object, Object, Object> f =
       (o1, o2, o3, o4, o5) -> null;
   final Function1<
           Object,
           Function1<Object, Function1<Object, Function1<Object, Function1<Object, Object>>>>>
       curried = f.curried();
   assertThat(curried).isNotNull();
 }