/**
  * We override the default so we can pass arrays as well as strings.
  * @param string $param
  * @return array
  */
 private function determineParam($param)
 {
     if (is_array($param)) {
         // If it's an array, we need to convert it to a string because of
         $param = '?' . http_build_query($param, '', '&');
     }
     return parent::determineParam($param);
 }