// f: A -> Comparable
static <A> L<A> sortedByCalculatedFieldDesc(Collection<A> c, fO f) {
  ret sortByCalculatedFieldDesc(c, f);
}

static <A> L<A> lambdaMapLike sortedByCalculatedFieldDesc(O f, Collection<A> c) {
  ret sortByCalculatedFieldDesc(f, c);
}

static <A, B> L<A> sortedByCalculatedFieldDesc(Iterable<A> c, IF1<A, B> f) {
  ret sortByCalculatedFieldDesc(c, f);
}

static <A, B> L<A> sortedByCalculatedFieldDesc(IF1<A, B> f, Iterable<A> c) {
  ret sortByCalculatedFieldDesc(f, c);
}