protected static function saveExtraParams(array $data)
    {
        $final_data = array();
        if (count($data) > 0) {
            Logger::log('Saving extra configuration parameters');
            foreach ($data as $key => $value) {
                if (null !== $value || $value !== '') {
                    $final_data[$key] = $value;
                }
            }
        }
        return $final_data;
    }