ConstructorDesturctorActions here are a fairly powerful pattern within the ServiceContext. You form a directed graph of actions, then process them all like FILO queue. I propose that we genericize them as something like ActionGraph. This would allow us to use them for new Decorable types, or for more esoteric use cases. Personally, I want to use an extra graph of actions to rephrase server startup and shutdown. (The first graph is ServiceContext construction and destruction.)