code: public function showAction($id)
      {
          $em = $this->getDoctrine()->getManager();
  
          $entity = $em->getRepository('ChillCustomFieldsBundle:CustomFieldsGroup')->find($id);
  
          if (!$entity) {
              throw $this->createNotFoundException('Unable to find CustomFieldsGroup entity.');
          }
          
          $options = $this->getOptionsAvailable($entity->getEntity());
  
          return $this->render('ChillCustomFieldsBundle:CustomFieldsGroup:show.html.twig', array(
              'entity'      => $entity,
              'create_field_form' => $this->createCreateFieldForm($entity)->createView(),
              'options' => $options
          ));
      }
docs: Finds and displays a CustomFieldsGroup entity.