node.DEFMETHOD("transform", function(tw, in_list){            var x, y;            tw.push(this);            if (tw.before) x = tw.before(this, descend, in_list);            if (x === undefined) {                if (!tw.after) {                    x = this;                    descend(x, tw);                } else {                    tw.stack[tw.stack.length - 1] = x = this.clone();                    descend(x, tw);                    y = tw.after(x, in_list);                    if (y !== undefined) x = y;                }            }            tw.pop();            return x;        });