seance = new MyCompanyEvents;
        $form = $this->createFormBuilder($seance)
          ->add('title', EntityType::class, array('class' => 'PaiementBundle:TypeSeance','choice_label' => 'nom'))
          ->add('lieu', EntityType::class, array('class' => 'BackendBundle:Lieu','choice_label' => 'nom'))
          ->add('nbPlacesDispo', IntegerType::class, array('attr' => array('class' => 'form-control', 'style' => 'margin-bottom:15px')))
          ->add('startDateTime', DateTimeType::class, array('attr' => array('class' => 'form-control', 'style' => 'margin-bottom:15px')))
          ->add('endDateTime', DateTimeType::class, array('attr' => array('class' => 'form-control', 'style' => 'margin-bottom:15px')))
          ->add('allDay', CheckboxType::class, array('label' => 'Journée entière','attr' => array('class' => 'form-control', 'style' => 'margin-bottom:15px'), 'required' => false))
          ->add('save', SubmitType::class, array('label' => 'Créer la séance', 'attr' => array('class' => 'btn btn-success', 'style' => 'margin-bottom:15px')))
          ->getForm();
          $form->handleRequest($request);