ORM Designer version 3.2.7.1338, MVC: Symfony3, ORM: Doctrine2
When I use the Gedmo Timestampable extension, I want to be able to declare NULL values on the value field. Currently this is either omitted completely or exported as a string.

Current output:
* @Gedmo\Timestampable(on="change", field="aktivierungstoken", value="null")
Expected output:
* @Gedmo\Timestampable(on="change", field="aktivierungstoken", value=null)