FWIW: I was referring to this: > Note that decorators and the original class object share a common set of features. In the previous diagram, the operation() me

FWIW: I was referring to this: > Note that decorators and the original class object share a common set of features. In the previous diagram, the operation() method was available in both the decorated and undecorated versions. and > GoF Book, "Design Patterns: Elements of Reusable Object-Oriented Software", p.166: > "A decorator object conforms to the interface of the component it decorates so that its presence is transparent to clients."