private ScheduledFuture<?> scheduleJob(Runnable job, long delayMillis) {
        return worker.schedule(safeRunnable(job), delayMillis, TimeUnit.MILLISECONDS);
    }
Fetches the internal IPs of the node.
kubernetes/src/main/java/com/linecorp/armeria/client/kubernetes/endpoints/KubernetesEndpointGroup.java