docs: public static StopWords getInstance(Language language) {
      if (!stopWordLists.containsKey(language)) {
        synchronized (StopWords.class) {
          if (!stopWordLists.containsKey(language)) {
            stopWordLists.put(language, Config.get("hermes.StopWords", language, "class").as(StopWords.class, new NoOptStopWords()));
          }
        }
      }
      return stopWordLists.get(language);
    }