}

  @LazyInit private transient @Nullable ColumnMap columnMap;

  @Override
  public Map<C, Map<R, @Nullable V>> columnMap() {
    ColumnMap map = columnMap;
    return (map == null) ? columnMap = new ColumnMap() : map;
  }

  @WeakOuter
  private final class ColumnMap extends ArrayMap<C, Map<R, @Nullable V>> {
    private ColumnMap() {
      super(columnKeyToIndex);
    }

    @Override

func (h *healSequence) getHealedItemsMap() map[madmin.HealItemType]int64 {
	h.mutex.RLock()
	defer h.mutex.RUnlock()

	// Make a copy before returning the value
	retMap := make(map[madmin.HealItemType]int64, len(h.healedItemsMap))
	maps.Copy(retMap, h.healedItemsMap)

	return retMap
}

// getHealFailedItemsMap - returns map of all items where heal failed against

	// map of STS access key to policy names
	iamSTSPolicyMap *xsync.MapOf[string, MappedPolicy]

	// map of group names to group info
	iamGroupsMap map[string]GroupInfo
	// map of user names to groups they are a member of
	iamUserGroupMemberships map[string]set.StringSet
	// map of group names to policy names
	iamGroupPolicyMap *xsync.MapOf[string, MappedPolicy]
}

func newIamCache() *iamCache {

func FilterObjectLockMetadata(metadata map[string]string, filterRetention, filterLegalHold bool) map[string]string {
	// Copy on write
	dst := metadata
	var copied bool
	delKey := func(key string) {
		key = strings.ToLower(key)
		if _, ok := metadata[key]; !ok {
			return
		}
		if !copied {
			dst = make(map[string]string, len(metadata))
			maps.Copy(dst, metadata)
			copied = true
		}

            new TestStringMapGenerator() {
              @Override
              protected Map<String, String> create(Entry<String, String>[] entries) {
                Map<String, String> map = populate(new HashMap<String, String>(), entries);
                return Collections.checkedMap(map, String.class, String.class);
              }
            })
        .named("checkedMap/HashMap")
        .withFeatures(

	sys.Lock()

	sys.initStore(objAPI, etcdClient)

	// Initialize RoleARNs
	sys.rolesMap = make(map[arn.ARN]string)

	// From OpenID
	maps.Copy(sys.rolesMap, sys.OpenIDConfig.GetRoleInfo())

	// From AuthN plugin if enabled.
	if authn := newGlobalAuthNPluginFn(); authn != nil {
		maps.Copy(sys.rolesMap, authn.GetRoleInfo())
	}

	sys.printIAMRoles()
	sys.Unlock()

	sys := &BucketTargetSys{
		arnRemotesMap: make(map[string]arnTarget),
		targetsMap:    make(map[string][]madmin.BucketTarget),
		arnErrsMap:    make(map[string]arnErrs),
		hc:            make(map[string]epHealth),
		hcClient:      newHCClient(),
	}
	// reload healthCheck endpoints map periodically to remove stale endpoints from the map.
	go func() {
		rTimer := time.NewTimer(defaultHealthCheckReloadDuration)

		SuccessorModTime:           o.SuccessorModTime,
		ReplicationStatusInternal:  o.ReplicationStatusInternal,
		VersionPurgeStatusInternal: o.VersionPurgeStatusInternal,
	}
	cinfo.UserDefined = make(map[string]string, len(o.UserDefined))
	maps.Copy(cinfo.UserDefined, o.UserDefined)
	return cinfo
}

func (o ObjectInfo) tierStats() tierStats {
	ts := tierStats{
		TotalSize:   uint64(o.Size),
		NumVersions: 1,
	}

<h3 id="more">Additional Mechanisms</h3>

<p>
The <code>sync</code> package provides additional synchronization abstractions,
including <a href="/pkg/sync/#Cond">condition variables</a>,
<a href="/pkg/sync/#Map">lock-free maps</a>,
<a href="/pkg/sync/#Pool">allocation pools</a>,
and
<a href="/pkg/sync/#WaitGroup">wait groups</a>.
The documentation for each of these specifies the guarantees it
makes concerning synchronization.
</p>

		config.DriveSubSys:          drive.DefaultKVS,
		config.ILMSubSys:            ilm.DefaultKVS,
		config.BatchSubSys:          batch.DefaultKVS,
		config.BrowserSubSys:        browser.DefaultKVS,
	}
	maps.Copy(kvs, notify.DefaultNotificationKVS)
	maps.Copy(kvs, lambda.DefaultLambdaKVS)
	if globalIsErasure {
		kvs[config.StorageClassSubSys] = storageclass.DefaultKVS
		kvs[config.HealSubSys] = heal.DefaultKVS
	}
	config.RegisterDefaultKVS(kvs)