presentationRepository method
Implementation
@override
PresentationRepository? presentationRepository(String? appId) {
if ((appId != null) && (_presentationRepository[appId] == null)) {
_presentationRepository[appId] = PresentationCache(PresentationFirestore(
() => appRepository()!.getSubCollection(appId, 'presentation'),
appId));
}
return _presentationRepository[appId];
}