static bool tok_isSingleTypeArg(L<S> tok, int iOpeningBracket) {
  int iClosingBracket = findEndOfTypeArgs(tok, iOpeningBracket)-1;
  if (iClosingBracket == iOpeningBracket+4) true;
  if (eq(get(tok, iOpeningBracket+4), "<")) {
    int j = findEndOfTypeArgs(tok, iOpeningBracket+4);
    print(j + "/" + (iClosingBracket-2));
    ret j == iClosingBracket-2;
  }
  false; // hmm
}