protected function log($message, $severity = LOG_INFO)
    {
        if (!isset($this->severityLabels[$severity])) {
            throw new Exception('Invalid severity value', 1426868867);
        }
        $this->importService->addEventMessage(sprintf('Record:Import:Log:%s', $this->severityLabels[$severity]), $message, $severity, $this->currentEvent);
    }