ObservableStore extension Null safety

StreamController implementation inspired by the sample controller sample at: https://dart.dev/articles/libraries/creating-streams#honoring-the-pause-state https://dart.dev/articles/libraries/code/stream_controller.dart

on

Properties

entityChanges Stream<List<Type>>
Returns a broadcast stream to data changes on all Entity types. [...]
read-only

Methods

watch<EntityT>() Stream<void>
Create a stream to data changes on EntityT (stored Entity class). [...]