static int mapMethodLike jfind_check(S checkToken, L<S> tok, S in) {
  ret jfind_check(checkToken, tok, in, null);
}

static int mapMethodLike jfind_check(S checkToken, L<S> tok, S in, O condition) {
  ifclass IndexedList2
  if (tok instanceof IndexedList2 && !tok.contains(checkToken)) ret -1;
  endif
  ifclass TokenIndexedList3
  if (tok instanceof TokenIndexedList3 && !tok.contains(checkToken)) ret -1;
  endif
    
  ret jfind(tok, in, condition);
}