dispose method Null safety
override
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
This method should only be called by the object's owner.
Implementation
@override
void dispose() {
super.dispose();
_loggingService.successfulDispose(location: runtimeType.toString());
}