library/Extlib/Http/Response.php
static public function getMessage($code = self::CODE_INTERNAL_SERVER_ERROR)
    {
        if (isset(self::$messages[$code])) {
            return self::$messages[$code];
        }
        
        return self::$messages[self::CODE_INTERNAL_SERVER_ERROR];
    }
static public function getMessage($code = self::CODE_INTERNAL_SERVER_ERROR)
    {
        if (isset(self::$messages[$code])) {
            return self::$messages[$code];
        }
        
        return self::$messages[self::CODE_INTERNAL_SERVER_ERROR];
    }
Get code message

@param int $code
@return string