static Set<LS> ai_simplifyUsingWordSets(LS tok, Collection<SS> maps) {
  Set<S> words = codeTokensAsCISet(tok);
  new LinkedHashSet<LS> out;
  for unnull (SS map : maps)
    if (isSuperSet(words, keySet(map))) {
      new LS tok2;
      removeToken(tok);
      out.add(tok2);
    }
  ret out;
}