Listing 43.2. Plik My/FrontendBundle/Resources/config/services.xml
<?xml version="1.0" ?>

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">

    <services>
       <service id="sonata.admin.city" class="My\FrontendBundle\Admin\CityAdmin">
          <tag name="sonata.admin" manager_type="orm" group="Dane" label="Miasta"/>
          <argument />
          <argument>My\FrontendBundle\Entity\City</argument>
          <argument>SonataAdminBundle:CRUD</argument>
          <call method="setTranslationDomain">
              <argument>MyFrontendBundle</argument>
          </call>
      </service>
   </services>

</container>