Google Maps API async loading w/ require.js 2.0

gistfile1.js

// lib/google-maps-loader.js

define({
    load: function(name, require, load, config) {

        var callback = 'maps_loader_' + new Date().getTime();

        window[callback] = function() {
            load(window.google);
        };

        require([ 'http://maps.googleapis.com/maps/api/js?key=' + name + '&sensor=false&callback=' + callback ]);

    }
});

// lib/google-maps.js

define([ 'lib/google-maps-loader!API_KEY_GOES_HERE' ], function(google) {

    return google;

});