return nil
	}
	return dst
}

// bucketsUsageInfo returns the buckets usage info as a map, with
// key as bucket name
func (d *dataUsageCache) bucketsUsageInfo(buckets []BucketInfo) map[string]BucketUsageInfo {
	dst := make(map[string]BucketUsageInfo, len(buckets))
	for _, bucket := range buckets {
		e := d.find(bucket.Name)
		if e == nil {
			continue
		}
		flat := d.flatten(*e)

		return
	}

	for bucket, usageInfo := range dataUsageInfo.BucketsUsage {
		stat := globalReplicationStats.Load().getLatestReplicationStats(bucket)
		// Total space used by bucket
		ch <- prometheus.MustNewConstMetric(
			prometheus.NewDesc(
				prometheus.BuildFQName(bucketNamespace, "usage", "size"),
				"Total bucket size",
				[]string{"bucket"}, nil),
			prometheus.GaugeValue,

Lifecycle transition functionality provided in [bucket lifecycle guide](https://github.com/minio/minio/master/docs/bucket/lifecycle/README.md) allows tiering of content from MinIO object store to public clouds or other MinIO clusters.

Transition tiers can be added to MinIO using `mc admin tier add` command to associate a `gcs`, `s3` or `azure` bucket or prefix path on a bucket to the tier name.

	peerRESTMethodDevNull               = "/devnull"
	peerRESTMethodNetperf               = "/netperf"
	peerRESTMethodGetReplicationMRF     = "/getreplicationmrf"
)

const (
	peerRESTBucket          = "bucket"
	peerRESTBuckets         = "buckets"
	peerRESTUser            = "user"
	peerRESTGroup           = "group"
	peerRESTUserTemp        = "user-temp"
	peerRESTPolicy          = "policy"
	peerRESTUserOrGroup     = "user-or-group"

	// Bucket operations.
	MakeBucket(ctx context.Context, bucket string, opts MakeBucketOptions) error
	GetBucketInfo(ctx context.Context, bucket string, opts BucketOptions) (bucketInfo BucketInfo, err error)
	ListBuckets(ctx context.Context, opts BucketOptions) (buckets []BucketInfo, err error)
	DeleteBucket(ctx context.Context, bucket string, opts DeleteBucketOptions) error

  rotating credentials.

- Access to bucket(s) and object(s) are governed via IAM policies associated with the incoming
  login credentials.

- Allows authentication and access for all
  - Built-in IDP users and their respective service accounts
  - LDAP/AD users and their respective service accounts
  - OpenID/OIDC service accounts

- On versioned buckets, FTP/SFTP only operates on latest objects, if you need to retrieve

					if configRetriableErrors(err) {
						logger.Info("Waiting for list buckets to succeed to initialize buckets.. possible cause (%v)", err)
						time.Sleep(time.Duration(r.Float64() * float64(time.Second)))
						continue
					}
					bootLogIf(GlobalContext, fmt.Errorf("Unable to list buckets to initialize bucket metadata sub-system: %w", err))
				}

				buckets = make([]string, len(bucketsList))
				for i := range bucketsList {

    return null;
  }

  @Nullable ImmutableMapEntry<K, V> getNextInValueBucket() {
    return null;
  }

  /**
   * Returns true if this entry has no bucket links and can safely be reused as a terminal entry in
   * a bucket in another map.
   */
  boolean isReusable() {
    return true;
  }

  static class NonTerminalImmutableMapEntry<K, V> extends ImmutableMapEntry<K, V> {
    /*

		m.Set(usageBucketVersionsCount, float64(usage.VersionsCount), "bucket", bucket)
		m.Set(usageBucketDeleteMarkersCount, float64(usage.DeleteMarkersCount), "bucket", bucket)

		if quota != nil && quota.Quota > 0 {
			m.Set(usageBucketQuotaTotalBytes, float64(quota.Quota), "bucket", bucket)
		}

		for k, v := range usage.ObjectSizesHistogram {
			m.Set(usageBucketObjectSizeDistribution, float64(v), "range", k, "bucket", bucket)

```
notify_webhook        publish bucket notifications to webhook endpoints
notify_amqp           publish bucket notifications to AMQP endpoints
notify_kafka          publish bucket notifications to Kafka endpoints
notify_mqtt           publish bucket notifications to MQTT endpoints
notify_nats           publish bucket notifications to NATS endpoints