public function configureOptions(OptionsResolver $resolver)
{
$resolver->setRequired(['base_field_name', 'custom_meta_tags', 'generated_url_selector', 'generate_url_callback_class', 'generate_url_callback_method', 'generate_url_callback_parameters']);
$resolver->setDefaults(['label' => false, 'custom_meta_tags' => false, 'generated_url_selector' => '#generatedUrl', 'generate_url_callback_parameters' => []]);
}