class Async {
    static function loadXMLDocument(sourceURL:String):Deferred {
        var d:Deferred = new Deferred();
        var myXML:XML = new XML();
        myXML.onLoad = function(p_success:Boolean):Void {
            if (p_success) {
                myXML.attributes["sourceURL"] = sourceURL;
                d.callback(myXML);
            } else {
                d.errback(new Error("XML at " + sourceURL + " did not load"))
            }
        }
        myXML.load(sourceURL);
        return d;
    }
}