// f: A -> Comparable
static <A, B> L<A> sortInPlaceByCalculatedFieldDesc(L<A> l, F1<A, B> f) {
  ret sortInPlaceByCalculatedFieldDesc_f1(l, f);
}

static <A, B> L<A> sortInPlaceByCalculatedFieldDesc(L<A> l, IF1<A, B> f) {
  ret sortInPlaceByCalculatedFieldDesc(l, if1ToF1(f));
}