static O timed(O f) {
  ret time(f);
}



static <A> A timed(F0<A> f) {
  ret time(f);
}

static <A> A timed(IF0<A> f) {
  ret time(f);
}

static <A> A timed(S msg, IF0<A> f) {
  ret time(msg, f);
}