Contao\Session::appendData PHP Méthode

    public function appendData($varData)
    {
        if (is_object($varData)) {
            $varData = get_object_vars($varData);
        }
        if (!is_array($varData)) {
            throw new \Exception('Array or object required to append session data');
        }
        foreach ($varData as $k => $v) {
            // Map the referer (see #281)
            if (in_array($k, $this->mappedKeys)) {
                $this->session->set($k, $v);
            } else {
                $this->sessionBag->set($k, $v);
            }
        }
    }