$form = $builder->getForm();
        $Shippings = $form->get('shippings');
        if (!empty($Shippings)) {
            foreach ($Shippings as $key => $Shipping) {
                $deliveries = null;
                $Shipping->remove('delivery')
                    ->add('delivery', 'entity', array(
                        'class' => 'Eccube\Entity\Delivery',
                        'property' => 'name',
                        'choices' => $deliveries,
//                        'data' => $delivery,
                        'constraints' => array(
                            new Assert\NotBlank(),
                        ),
                    ));