Sylius/Sylius — pull request #2241 by bburnichon (2014-12-10 12:20:17+00:00)
Title: Avoid break of Metadata loading process.

refs #1630

In my case, I want to be able to override attribute of numbered entity for example.

Not sure all cases are handled this way but seems to be working on my local tests. (ODM part not tested as I currently don't have this requirement)