Use case

Right now, there isn't enough (or probably not at all) documentation describing that a ChangeNotifier can be plugged into an AnimatedBuilder widget to listen for rebuilds. The name is misleading but it's not going to change so, at least, we should write more documentation to make the users aware of the use-case

Proposal

Enhance the documentation of both classes:

• For ChangeNotifier, explicitly write that it can be listened in an AnimatedBuilder widget
• For AnimatedBuilder, add a short Flutter example showing how an InheritedWidget exposing a ChangeNotifier can listen to changes to rebuild only specific parts of the UI (rather than the entire subtree)