Modern PHP frameworks rely heavily on use of magic methods, __get in particular.
It would be very handy if developer could tell xdebug how to display objects of particular class.

For example, in my Yii application i have ORM model Client, and i need to watch how it's attributes change with every step of code, but since it's dynamic property, calculated by getAttributes method, the only way is to assign watch on it, but it's tedious, and incorrect watch will break programm.

What i propose is to xdebug to scan object's for presense of special ,method ("__xdebug_inspect" for example) and use it to display object in balloon evaluation and "variables" window of IDE. The method should return string or some kind of config in array.