code: protected function transformDSLSortToString($dslSort) {
          $string = "";
          if (is_array($dslSort)) {
              foreach ($dslSort as $sort) {
                  if (is_array($sort)) {
                      $field = key($sort);
                      $info = current($sort);
                  }
                  else
                      $field = $sort;
                  $string .= "&sort=" . $field;
                  if (isset($info)) {
                      if (is_string($info) && $info == "desc")
                          $string .= ":reverse";
                      elseif (is_array($info) && array_key_exists("reverse", $info) && $info['reverse'])
                          $string .= ":reverse";
                  }
              }
          }
          return $string;
      }
docs: Transform search parameters to string
  
  @return string
  @param mixed $dslSort