MANullAccessor

Does MANullAccessor have to be so so... erm unusable? If you happen to use it nothing seems to work with it. i.e. accessor selector doesnt work, one should argue that it shouldnt, but is it doing a good job of being a null? Most users of read: dont test canRead: first. I am thinking of implementing a subclass MADummyAccessor which does implement read: just so as it can play with the other accessors in mementos etc. I just wondered if there was a case for making MANullAccessor more friendly, i.e. swap its behaviour from pessimistic to optimistic, rather than expecting all users to test canRead: first, expect those users that really care to test cantRead: just an idea Keith