dispose method
- @override
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 and removeListener will throw after the object is disposed).
This method should only be called by the object's owner.
Implementation
@override
void dispose() {
assert(pixels != null);
activity?.dispose(); // it will be null if it got absorbed by another ScrollPosition
_activity = null;
super.dispose();
}