code: public boolean isStopWord(HString text) {
      if (text == null) {
        return true;
      } else if (text.isInstance(Types.TOKEN)) {
        return isTokenStopWord(Cast.as(text));
      }
      return text.tokens().stream().allMatch(this::isTokenStopWord);
    }
docs: Is stop word.
  
  @param text the text
  @return the boolean