@Test
public void succesful_isIn_assertion_using_field_by_field_element_comparator() {
List<Foo> list1 = singletonList(new Foo("id", 1));
List<Foo> list2 = singletonList(new Foo("id", 1));
System.out.println(new FieldByFieldComparator());
assertThat(list1).usingFieldByFieldElementComparator().isIn(singletonList(list2));
}