sonata-project/SonataDoctrineORMAdminBundle — comment on commit fe1e93f8484d8dc34b3ad1fb19e243bb9a75816d
File: Resources/doc/reference/configuration.rst line 15
By stof:

by default, it is ``null`` to use the default one. ``"default"`` will use an entity manager named ``default``, not the default one (which could have a different name)