Comparator
Contents
https://reversecoding.net/java-8-comparator-how-to-sort-a-list/
List<Human> humans = Lists.newArrayList(
new Human("Sarah", 12),
new Human("Sarah", 10),
new Human("Zack", 12)
);
humans.sort(Comparator.comparing(Human::getName).thenComparing(Human::getAge));