// f: A -> S
static <A> L<A> sortInPlaceByCalculatedFieldIC(L<A> l, final F1<A, S> f) {
  sort(l, new Comparator<A>() {
    public int compare(A a, A b) {
      ret compareIC(f.get(a), f.get(b));
    }
  });
  ret l;
}