class ActivitySettingRequestSchema { final String langCode; ActivitySettingRequestSchema({required this.langCode}); Map toJson() { return { 'lang_code': langCode, }; } String get storageKey => 'topic_list-$langCode'; } class ActivitySettingResponseSchema { final String defaultName; final String name; ActivitySettingResponseSchema({ required this.defaultName, required this.name, }); factory ActivitySettingResponseSchema.fromJson(Map json) { return ActivitySettingResponseSchema( defaultName: json['default_name'], name: json['name'], ); } Map toJson() { return { 'default_name': defaultName, 'name': name, }; } }