easyadmin symfony setear campo updatedAt para todas las entidades

crear // src/AppBundle/Controller/AdminController.php

class AdminController extends BaseAdminController
{
    public function preUpdateEntity($entity)
    {
        if (method_exists($entity, 'setUpdatedAt')) {
            $entity->setUpdatedAt(new \DateTime());
        }
    }


en routing.yml

easy_admin_bundle:
    resource: '@AppBundle/Controller/AdminController.php'