static WordTokReplacer wordTokReplacerRule(S sentence, S _vars, S replaced, O... _) {
  ret WordTokReplacer(sentence, _vars, replaced);
}

static WordTokReplacer wordTokReplacerRule(S sentence, Collection<S> vars, S replaced, O... _) {
  ret WordTokReplacer(sentence, vars, replaced);
}