static <A> L<A> sorted(Collection<A> c, O comparator) {
  L<A> l = cloneList(c);
  sort(l, makeComparator(comparator));
  ret l;
}

static <A> L<A> sorted(Collection<A> c) {
  L<A> l = cloneList(c);
  sort(l);
  ret l;
}

static <A> L<A> sorted(Comparator<A> comparator, Collection<A> c) {
  L<A> l = cloneList(c);
  sort(l, comparator);
  ret l;
}