Hi,
We have discussed this feature again and evaluated possible ways how to implement it. To achieve this functionality would mean that ORM Designer would have to modify the PHP code (not only the @ORM annotations as is the current state).
ORM Designer does not allow for this due to security reasons. And because this change would mean huge changes in the architecture of ORM Designer, we have to abandon this feature for now. Unfortunately we do not plan to implement it in the near future.