javascript

var Foo = {};

Foo.Bar = function () {

    var num = 10;
    return {
        getNum : function () {
            return num;
        }
    };

}();

Foo.Baz = function () {

    var num = 5;
    return {
        getSum : function () {
            return num + Foo.Bar.getNum.call(this);
        }
    };

}();