public function scheduleEvent() {
        add_action(self::EVENT_NAME, [$this, 'updateAllOrders']);
        $cron = wp_next_scheduled(self::EVENT_NAME);
        if ($cron) {
            return false;
        }

        $unixts = (new DateTime('now', new DateTimeZone('UTC')))->getTimestamp();

        return wp_schedule_event($unixts, 'hourly', self::EVENT_NAME);
    }