Prado\Web\THttpSession::setSessionName PHP Method

    public function setSessionName($value)
    {
        if ($this->_started) {
            throw new TInvalidOperationException('httpsession_sessionname_unchangeable');
        } else {
            if (ctype_alnum($value)) {
                session_name($value);
            } else {
                throw new TInvalidDataValueException('httpsession_sessionname_invalid', $value);
            }
        }
    }