sonata-project/SonataMediaBundle — pull request #666 by cbastienbaron (2014-11-18 10:04:51+00:00)
Title: Ensure element unlink exist

The form type media_type can be manipulated with events, inherits etc

Now we can remove element unlink without have

Child "unlink" does not exist. - 500 Internal Server Error - OutOfBoundsException