add Properties (get set) to BackBone Models

gistfile1.js

window.BBExtModel = Backbone.Model.extend({
    initialize : function() {
        function defineProperty(o,p) {
            Object.defineProperty(o,p,{
                get : function() { return o.get(p);},
                set : function(value) {
                    var v = {}; v[p] = value;
                    o.set(v);
                },
                enumerable: true,
                configurable: true
            });
        };
        var m;
        for(m in this.attributes){
            defineProperty(this, m);
        }
    }
});

window.Human = BBExtModel.extend({});
    
window.Animal = BBExtModel.extend({
    initialize: function Animal() {
        BBExtModel.prototype.initialize.call(this);
        console.log('doing something');
    }
});

var bob = new Human({firstName:'Bob', lastName:'Morane'});
var wolf = new Animal({name:'WOLF'});

/*
Now :

bob.firstName is equivalent to bob.get('firstName')
bob.firstName = "BOBBY" is equivalent to bob.set({firstName : 'BOBBY'})
*/