static LS tok_splitAtFirstSpacedDash(S s) {
  LS tok = javaTokWithAllBrackets(s);
  final new Flag flag;
  ret tok_combineCodeTokenRanges(tok, findNCNNonStreaks(tok, 
    func(LS tok) -> Bool {
      if (flag.isUp() || !tok_isSpacedDash(tok)) false;
      ret true with flag.raise();
    }));
}