DART

flutter How to dispose subscription

class EventNotifier extends ValueNotifier<List<String>> {
  // Omitted

  @override
  void dispose() {
    streamSub.cancel();
    super.dispose();
  }
}

dispose in dart

Dart does not have destructors. 
Objects are automatically garbage collected when no longer referenced

In flutter we can do like for widget dispose:

@override
void dispose() {
	// your dispose part
	super.dispose();
}