Simple widget to create own Scopes

[PlugFox]

Create simple abstract class / widget / mixin to create own Scopes

[PlugFox]

Something like this:

class MyCustomScope = StatelessWidget with ScopeMixin;

mixin ScopeMixin on StatelessWidget {
  @override
  StatelessElement createElement() => StatelessElement(this);

  Widget build(BuildContext context) => const Offstage();
}