public JSONObject toJSONObject() {        JSONObject jsonObject=new JSONObject();        Set
    
      subSet=getFaqSubSet()==null?new HashSet<>():getFaqSubSet();        JSONArray array=new JSONArray();        Iterator
     
       it = subSet.iterator();        while (it.hasNext()) {            FaqSub faqSub=it.next();            array.add(faqSub.toJSONObject());        }        jsonObject.put("id", CommonSugar.getTypedDefault(getId(),0L));        jsonObject.put("title",CommonSugar.getTypedDefault(getTitle(),""));        jsonObject.put("set",CommonSugar.getTypedDefault(array,""));        return jsonObject;    }