a_model.js

(function($) {
var thisIsPrivate = function(number) {
    console.log("this can only be called from inside this scope", number);
}

var soIsThis = 4;

$.Model.extend('MyModel',
/* static */
{
},
/* prototype */
{
    thisIsPriveleged: function() {
        console.log("this can access the private members");
        thisIsPrivate(soIsThis);
}
})(jQuery);