Consider adding sonata admin classes to the bundle

[Padam87]

[greg0ire]

I think the main headache will be there : sonata-project/SonataAdminBundle#1971 . The schema is a collection of definitions, and definition options are a collection too. Sonata doesn't play well with nested collection widgets ATM. I ended up creating 5 definition fields in my Library entity to avoid the first level (I know, it's very ugly 😜 ).