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All right, youre done. Lets take a look at the solution. Delete is actually pretty straightforward. Note that once again we have almost useless parameters. S actually refers to our selection while our strings here are actually our selection Rs. One little trickiness in delete is that if you actually put no selection in, itll delete all the rows. I still want to make sure we notify the change. Ive done the slide optimization here. It would be fine to just notify the change always, but Ive decided if no rows have been deleted, then we should bother not notifying. Unless the selection is null, in which case we deleted all the rows, but again, it would be fine to just use notify change here even if no rows are actually deleted. After all, the intention was that rows would be deleted. Once again, lets take pity on someone who might have to maintain your code, and change these default parameter names to something more useful like selection and selectionargs. Other than that, update loo
