appBarRepository method
Implementation
@override
AppBarRepository? appBarRepository(String? appId) {
if ((appId != null) && (_appBarRepository[appId] == null)) {
_appBarRepository[appId] = AppBarCache(AppBarFirestore(
() => appRepository()!.getSubCollection(appId, 'appbar'), appId));
}
return _appBarRepository[appId];
}