static S asteriskPartsOnly(S s) {
  L<S> tok = javaTokC(s);
  replaceSubList(tok, ll("*", "*"), ll("*"));
  new L<S> words;
  int i = 0;
  while ((i = indexOf(tok, "*", i)) >= 0) {
    int j = indexOf(tok, "*", ++i);
    if (j < 0) break;
    words.addAll(subList(tok, i, j));
    i = j+1;
  }
  ret joinWithSpace(words);
}