Add accessors for League\FactoryMuffin\Factory::$saved

[curtis1000]

My suite automatically runs FactoryMuffin::deleteSaved() to clean up models after tests have run.

I run into trouble when I have a test that need to delete models manually as a part of the test. A DeletingFailedException is being thrown, and I do understand why that's happening.

Since my test needs to delete a model manually, I need a way to tell FactoryMuffin that a certain model should be skipped over when it attempts to deleteSaved().

That could be a accomplished a few different ways. It could be an option passed into the create() method, or it could be simply adding a getter/setter for the $saved collection, allowing my test to do the work of filtering the list of objects to be deleted later.

[GrahamCampbell]

Just catch the exception?

[GrahamCampbell]

The exception doesn't stop the rest of the deletions from happening, we continue deleting, then throw at the end.

[GrahamCampbell]

https://github.com/thephpleague/factory-muffin/blob/master/src/Exceptions/DeletingFailedException.php#L80

[GrahamCampbell]

You could also make an assertion on the number of failures.

[curtis1000]

I will assert the number of failures, that should clear things up, thank you!