static O callAndMake_plusMap(S f, O... args) {
  new Matches m;
  if (startsWith(f, "map ", m) && l(args) == 1) {
    fS f2 = m.rest();
    ret map(func(O o) -> O { callAndMake(f2, o) }, (Iterable) first(args));
  }
  ret callAndMake(f, args);
}