/**
  * Translate a field code to the field order number
  *
  * @param FieldsDefinition $fields
  * @param string $fieldId
  * @return string {order} or original value
  */
 protected function translateFieldCode(FieldsDefinition $fields, $fieldId)
 {
     $field = $fields->getField($fieldId);
     if ($field instanceof FieldInterface) {
         return '{f' . $field->getOrder() . '}';
     }
     return $fieldId;
 }