You need to explain what is happening in
Al K
1

I’m happy that at least you find something useful…

But regrading your concerns, I gave an example of item that is going to be deleted. the item is first deleted from the collection and not seen anymore in the UI, but if the operation fail later, like server error occurred, Then I have to re-add it to the collection, and not refreshing all the page as the first solution.

You can think on more actions that can be failed later and you may want to register how to overcome failures. that is the `callback` you send to the error handling service.