static <A> L<A> sortedByIC(Iterable<A> c, IF1<A, S> f) {
  L<A> l = cloneList(c);
  sort(l, (a, b) -> compareIC(f.get(a), f.get(b)));
  ret l;
}

static <A> L<A> lambdaMapLike sortedByIC(IF1<A, S> f, Iterable<A> c) {
  ret sortedByIC(c, f);
}