How can I cancel a StreamSubscription in my Notifier class?

[Biplab-Dutta]

I have a class that extends AutoDisposeNotifier and I have a NotifierProvider.autoDispose as well. How can I cancel the stream subscription when the notifier is disposed. Or when the page is disposed. I can't do ref.onDispose in my NotifierProvider as it doesn't provide ref object in the callback. Is there any other recommended approach?

[rrousselGit]

Notifiers have a ref property, so you can use ref.onDispose

[Biplab-Dutta]

I don't get it. Am I supposed to create a method in my class (that extends Notifier) with ref.onDispose inside the method and have that method called in my State.dispose? I can't do ref.onDispose in the NotifierProvider as I don't have a ref in the callback.
Also, using ref inside State.dispose isn't recommended. So, I am clearly wrong here.
@rrousselGit

[Biplab-Dutta]

I did it inside of the build method in my Notifier. I hope I am doing it right.