public function buildForm(FormBuilderInterface $builder, array $options)
 {
     $delivery_addresses = array();
     foreach ($this->user->getDeliveryAddresses() as $add) {
         $delivery_addresses[$add->getId()] = $add->getFullAddress();
     }
     if (!empty($delivery_addresses)) {
         $delivery_addresses['create_new'] = 'Создать новый';
         $builder->add('exist', 'choice', array('choices' => $delivery_addresses, 'required' => false, 'expanded' => true));
     }
     $builder->add('new', 'delivery_address', array('required' => false));
     $transformer = new OrderDeliveryAddressTransformer($this->om, $this->user);
     $builder->appendClientTransformer($transformer);
 }