[jQuery] Encapsulation Style

[Jeff.M]

When writing plugins and such, what is your preferred style for
encapsulation? I know of two styles:

var PublicObject = function () {

        // Private
        function Function1() {
        }

        // Exposed
        function Function2() {
        }

        return {
                PublicMethod: Function2
        };

} ();

-- OR --

(function () {

        window.PublicObject = {
                PublicMethod: Function2
        };

        // Private
        function Function1() {
        }

        // Exposed
        function Function2() {
        }

})();