protected function disableValidators(array $fields, $validators = null)
 {
     foreach ($fields as $field) {
         if (!$this->form->has($field)) {
             continue;
         }
         $fc_field = $this->fc_form->getFieldByName($field);
         if (!$fc_field instanceof FcField) {
             continue;
         }
         foreach ($fc_field->getConstraints() as $fc_constraint) {
             if (null === $validators || in_array($fc_constraint->getConstraint(), $validators)) {
                 $this->del_groups[] = $fc_constraint->getConstraint() . '_' . $fc_field->getId();
             }
         }
     }
 }