static Collection<Set<S>> allContainedWordSets(LS tok, Collection<Set<S>> wordSets) {
  Set<S> words = codeTokensAsCISet(tok);
  ret filter(wordSets, set -> setContainsSet(words, set));
}

static Collection<Set<S>> allContainedWordSets(S s, Collection<Set<S>> wordSets) {
  ret allContainedWordSets(wordTok_noBrackets(s), wordSets);
}