All generated classes as Labels

With version 5.1, is it possible to access all generated classes with corresponding strings? With older version, I have extension like

```
extension BuildContextExtension on BuildContext {

// Get translated label by calling [context.translate().foo.barTitle]
AppLocalizations_Labels translate() {
return AppLocalizations.of(this);
}
}
```

It would be awesome to have something similar here 🙏