DesignPremium EpisodesS5 Premium Episode #449: Substitutable Whole Value Avdi Grimm October 6, 2016 4 Comments This page is just for members. Sign in or subscribe to gain access! Username Password * Remember Me Forgot Password Related CategoriesDesign, Premium Episodes, S5 PremiumTagsCHECKS Pattern Language, oop, patterns, Structural Coupling, Whole Value