svoid tok_forUnnull(LS tok) {

  jreplace(tok, "fOr (", "for unnull (");

  int i = -1;

  while ((i = jfind(tok, i+1, "for unnull (")) >= 0) {

    int argsFrom = i+4;

    int iColon = indexOf(tok, i, ":");

    int iClosing = tok_findEndOfForExpression(tok, iColon+2);

    ifdef tok_forUnnull_debug

      print("Found for unnull: " + joinSubList(tok, i, iClosing+1));

    endifdef

    clearTokens(tok, i+2, i+4);

    tokPrepend(tok, iColon+2, "unnullForIteration(");

    tokPrepend(tok, iClosing, ")");

    reTok(tok, i+2, iClosing+1);

    ifdef tok_forUnnull_debug

      print("for unnull => " + joinSubList(tok, i, iClosing+1));

    endifdef

  }

}