Wrapping a plugin that modifies the jQuery object in a "sandbox" so that we can control exactly which jQuery the plugin modifies.

coolplug.js

define('coolplug-1', function() {

    // sandbox function
    return function($) {
        
        //---- usual plugin code starts here ----
        
        $.fn.cool = function() { alert('cool!'); }
        
        //---- usual plugin code ends here ------

        return $;
    }
});

gelApp.js

define('gelApp', ['jquery-1', 'coolplug-1']
    function($, plugin) {
        // $ is a reference to the same jquery-1 everyone gets from requireJS
        var plugged$ = plugin( $.sub() ); // attach plugin to a local copy of $
        
        plugged$('p').cool(); // <-- alerts 'cool!'
        $('p').cool(); // <-- Error: "cool" undefined
    }
);

so if we someone wants to use jquery with three plugins extending just his "private copy" of jquery:

define('gelApp', ['jquery-1', 'coolplug-1', 'coolplug-2', 'coolplug-3'],
function($, plugin1, plugin2, plugin3) {

    // $ is overwritten and is now a completely separate local copy with the added plugins

    $ = plugin3(plugin2(plugin1( $.sub() ))); 

}

);