private function handleNotification(Notification $notification)
    {
        if (empty($notification->targetTypes())) {
            return;
        }
        $objectsByTypes = [];
        $numTotal = 0;
        foreach ($notification->targetTypes() as $objType) {
            $objType = trim($objType);
            $objects = $this->updatedObjects($objType);
            $num = count($objects);
            if ($num == 0) {
                continue;
            }
            $obj = [];
            $obj['objects'] = $objects;
            $obj['num'] = $num;
            $obj['type'] = $objType;
            $obj['typeLabel'] = isset($objects[0]['targetTypeLabel']) ? $objects[0]['targetTypeLabel'] : $objType;

            $objectsByTypes[$objType] = $obj;
            $numTotal += $num;
        }
        $this->sendEmail($notification, $objectsByTypes, $numTotal);
    }