function wrap(fn) {
            return (isFunction(fn)) ?
                function (data) {
                    if (!config.allowCache || !--self._requests) {
                        delete YUI.Env.JSONP[proxy];
                    }
                    fn.apply(config.context, [data].concat(config.args));
                } :
                null;
        }
Issues the JSONP request.

@method send
@param args* {any} any additional arguments to pass to the url formatter
             beyond the base url and the proxy function name
@chainable