public function buildForm(\Symfony\Component\Form\FormBuilderInterface $builder, array $options)
 {
     parent::buildForm($builder, $options);
     $builder->add('references', 'text', array('attr' => array('placeholder' => 'ID oferty', 'pattern' => '\\d+'), 'data' => $this->getReferences(), 'required' => false));
     $builder->add('created_at', 'text', array('attr' => array('placeholder' => 'Data utworzenia', 'pattern' => '\\d{2}.\\d{2}.\\d{4}'), 'data' => $this->getCreatedAt(), 'required' => false));
     $builder->add('status', 'choice', array('choices' => \DataBundle\Entity\Offer::GetStatuses(), 'placeholder' => 'Wybierz status', 'required' => false, 'data' => $this->getStatus(), 'attr' => array('pattern' => '\\d+')));
 }