toJson method
Implementation
Map toJson(){
Map result = {};
if (count != null) result.addAll({"count": count});
if (result != null) result.addAll({"result": result});
if (imageQualityList != null) result.addAll({"imageQualityList": imageQualityList});
if (pageIndex != null) result.addAll({"pageIndex": pageIndex});
return result;
}