/**
  * *
  *
  * @param mixed $code
  *        	This is a description
  * @param mixed $message
  *        	This is a description
  * @param mixed $useAttrs
  *        	This is a description
  * @param mixed $stringOutput
  *        	This is a description
  * @return mixed This is the return value description
  */
 public static function error($code, $message, $useAttrs = true, $stringOutput = true)
 {
     $result = new Response(array(), false, $useAttrs);
     $result->appendError($code, $message);
     if ($stringOutput) {
         return $result->xml->asXml();
     } else {
         return $result->xml;
     }
 }