/**
  * @param LengthAwarePaginator $paginator
  * @param $bootstrapVersion
  * @return string
  */
 protected static function _render(LengthAwarePaginator $paginator, $bootstrapVersion)
 {
     if ($paginator->lastPage() <= 1) {
         return '';
     }
     switch ($bootstrapVersion) {
         case 4:
             $defaultPresenter = 'pagination::bootstrap-4';
             break;
         default:
             $defaultPresenter = '';
     }
     return $paginator->render($defaultPresenter);
 }