fsi-open/datagrid — pull request #51 by norzechowicz (2014-04-04 21:13:10+00:00)
Title: Collection column type

Sometimes objects have fields that conains arrays. Just like Symfony2 [UserInterface](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Security/Core/User/UserInterface.php#L52) have roles.
This column should be used in such cases.