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), "<"))
    ret findEndOfTypeArgs(tok, iOpeningBracket+4) == iClosingBracket-2;
  false; // hmm
}