_wrapFn = function(fn) {
        var ret = null;
        if (fn) {
            ret = (typeof fn == 'string') ?
            function(n) {
                return Y.Selector.test(n, fn);
            } :
            function(n) {
                return fn(Y.one(n));
            };
        }

        return ret;
    }
The underlying DOM node bound to the Y.Node instance
@property _node
@private