Note that if you add a slot, people won't be able to use it unless you also add a feature to protect uses of it.
That would be something to do just before ASDF 3.2 or ASDF 4.
Note that if you add a slot, people won't be able to use it unless you also add a feature to protect uses of it.
That would be something to do just before ASDF 3.2 or ASDF 4.