Why not refactor XXX into ZZZ (which holds everything but XXX->setup) and XXX which inherits from ZZZ and only has distinctive setup? YYY can now inherit from ZZZ as well. 
WWW (+setup)        WWW (+setup)
 +-XXX (+setup) =>   +-ZZZ
    +-YYY               +-XXX (+setup)
                        +-YYY

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In reply to Re^3: Call Grandparent Method, Skipping Parent by Dallaylaen
in thread Call Grandparent Method, Skipping Parent by QM

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