The _update method of Updatable is currently marked as abstract, because we thought this would help remind implementers of derived classes to think about whether they need to do any special work in the derived class. It seems that this has not helped, and the code would be simplified by removing this abstract marking and adjusting the derived classes in response.
The
_updatemethod ofUpdatableis currently marked as abstract, because we thought this would help remind implementers of derived classes to think about whether they need to do any special work in the derived class. It seems that this has not helped, and the code would be simplified by removing this abstract marking and adjusting the derived classes in response.