While i think it should be sender.message(receiver, params) Why do you think that? Not trolling - it's hard to understand what you might or might not be "

While i think it should be sender.message(receiver, params) Why do you think that? Not trolling - it's hard to understand what you might or might not be "missing" without understanding your thought process. In the overwhelming majority of cases, "sender" is implied by context; objects do not send messages on behalf of other objects.