Sylius\Bundle\PromotionBundle\Form\EventListener\AbstractConfigurationSubscriber::addConfigurationFields PHP Method

    protected function addConfigurationFields(FormInterface $form, $registryIdentifier, array $data = [])
    {
        // FIXME: Unknown type of $model, may crash in any moment!
        $model = $this->registry->get($registryIdentifier);
        // temporary solution to prevent errors while rendering unexisting rule configuration type
        if (null === ($configuration = $model->getConfigurationFormType())) {
            return;
        }
        $configurationField = $this->factory->createNamed('configuration', $configuration, $data, ['auto_initialize' => false, 'label' => false]);
        $form->add($configurationField);
    }