Simple demo of pre-logging aspect

listenTo.js

    function listenTo(target, notify) {

        var proxy = {};

        Object.keys(target).forEach(function(methodName) {

            var targetMethod = target[methodName].bind(target);

            proxy[methodName] = function() {
                var args = Array.prototype.slice.call(arguments);
                notify({ method: methodName, args: args });
                targetMethod.apply(args);
            };
        });

        return proxy;
    }