Flatten dictionary description

Hi, I'm trying to flatten an accessor, but I can't find how. What I have is ClassA which has a dictionary with ClassB as its association values, and each ClassB has a value too. What I want to accomplish, is to flatten all this structure, so everytime I want to edit an instance of ClassA, I have direct access to ClassB's value. ClassA has a dictionary, but its access is encapsulated trough ClassA>>atXXX: and ClassA>>atXXX:put:, I could change it to standard #at:put: pair, in order to user MADictionaryAccesor or use a MAPlugabbleAccessor, but I'm doing something wrong, because I don't know how to flatten ClassA descriptions. Any pointer or example to look at? Thanks in advance, -- Esteban A. Maringolo