.result();
    Comparator<Foo> comparatorUsingComparatorMethods =
        comparing((Foo foo) -> foo.aString)
            .thenComparing(foo -> foo.anInt)
            .thenComparing(foo -> foo.anEnum, nullsLast(naturalOrder()));
    ImmutableList<Foo> instances =
        ImmutableList.of(
            new Foo("a", 1, TriState.TRUE),
            new Foo("a", 2, TriState.TRUE),

 * import static java.util.Comparator.naturalOrder;
 *
 * ...
 *   private static final Comparator<Foo> COMPARATOR =
 *       comparing((Foo foo) -> foo.aString)
 *           .thenComparing(foo -> foo.anInt)
 *           .thenComparing(foo -> foo.anEnum, nullsLast(naturalOrder()));
 *
 *   @Override
 *   public int compareTo(Foo that) {
 *     return COMPARATOR.compare(this, that);
 *   }
 * }
 *