Remove ArrayBuilderInterface ?

[chriskoch]

Controller::renderJson() uses as an optional param a instance of ArrayBuilderInterface. The idea behind was that you can convert complex objects to an assoc. array. We can remove all corresponding code if we check against JsonSerializable interface instead:

Opinions?

[tdeekens]

Feels like this almost only boils down to personal taste. I am don't really like passing interfaces around as method params. I think you could also go for a more functional way by just stating that an object can have a ->toJSON() which will be called in that case. A bit like the backbone's way of using parse and toJSON too.
Or just stating that the object has to be implementing a lmvc-jsonifyinterface with that method, if you want to trade method existence for instance checks.