getOrCreate method
Implementation
Future<AppBarModel> getOrCreate() async {
var appBarModel =
await appBarRepository(appId: app.documentID)!.get(identifier);
if (appBarModel == null) {
appBarModel = AppBarModel(
documentID: identifier,
appId: app.documentID,
header: HeaderSelection.title,
iconMenu: await menuDef());
await appBarRepository(appId: app.documentID)!.add(appBarModel);
}
return appBarModel;
}