FriendsOfSymfony/FOSJsRoutingBundle — comment on commit 1a02f6383581149eeb1405dee8d97b7592b97f98
File: Controller/Controller.php line 60
By stof:

``$_format`` can only be ``js`` or ``json``. See the routing requirement. I only use the argument to set the content type. But we could even drop it and let the ResponseListener handle it