code: public static CharArraySet getStopWords() {
          final CharArraySet words = StopFilter.makeStopSet(ADDITIONAL_STOP_WORDS, true);
          words.addAll(EnglishAnalyzer.ENGLISH_STOP_WORDS_SET);
          return words;
      }
docs: Returns the set of stop words being used.
  
  @return the set of stop words being used