[chris_j]

Apologies in advance for going on a slight tangent here but it's my view that defining getters and setters is not considered idiomatic OO code either. If one object is using getters and setter to access the state of another then this suggests that there feature envy and excessive coupling between those two objects. These days, I try to follow the Law Of Demeter (https://en.wikipedia.org/wiki/Law_of_Demeter) and avoid that sort of thing. The logic that calls the getters and settings should really be in a class with a single responsibility that we call by invoking its methods in a tell-don't-ask style. As others have already pointed out, we can do similar things in a functional language like Clojure by encapsulating state in an atom (or an agent) and applying pure functions to that state.