toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data["group_topic_info_result_error_code"] = errorCode;
data["group_topic_info_result_error_message"] = errorMessage;
data["group_topic_info_result_topic_info"] = topicInfo?.toJson();
return data;
}