DelList(key []string) error
	Open() error
	Delete() error
	Extension() string
}

// Key denotes the key present in the store.
type Key struct {
	Name   string
	IsLast bool
}

// replayItems - Reads the items from the store and replays.
func replayItems[I any](store Store[I], doneCh <-chan struct{}, log logger, id string) <-chan Key {
	keyCh := make(chan Key)

	go func() {
		defer xioutil.SafeClose(keyCh)

// operation, we fetch this info from storage, and refresh the cache as well.
func (store *IAMStoreSys) ListGroups(ctx context.Context) (res []string, err error) {
	cache := store.lock()
	defer store.unlock()

	if store.getUsersSysType() == MinIOUsersSysType {
		m := map[string]GroupInfo{}
		err = store.loadGroups(ctx, m)
		if err != nil {
			return
		}
		cache.iamGroupsMap = m

		if listKey == iamFormatFile {
			continue
		}

		res[listKey] = append(res[listKey], trimmedItem)
	}
	// Store the listing for later re-use.
	iamOS.cachedIAMListing.Store(res)
	return res, nil
}

// PurgeExpiredSTS - purge expired STS credentials from object store.
func (iamOS *IAMObjectStore) PurgeExpiredSTS(ctx context.Context) error {
	if iamOS.objAPI == nil {
		return errServerNotInitialized
	}

	var p MappedPolicy
	err := ies.loadIAMConfig(ctx, &p, getMappedPolicyPath(name, userType, isGroup))
	if err != nil {
		if err == errConfigNotFound {
			return errNoSuchPolicy
		}
		return err
	}
	m.Store(name, p)
	return nil
}

func getMappedPolicy(kv *mvccpb.KeyValue, m *xsync.MapOf[string, MappedPolicy], basePrefix string) error {
	var p MappedPolicy
	err := getIAMConfig(&p, kv.Value, string(kv.Key))

// Name - returns the Name of the target.
func (target *RedisTarget) Name() string {
	return target.ID().String()
}

// Store returns any underlying store if set.
func (target *RedisTarget) Store() event.TargetStore {
	return target.store
}

// IsActive - Return true if target is up and active
func (target *RedisTarget) IsActive() (bool, error) {
	if err := target.init(); err != nil {
		return false, err
	}

	store.RLock()
	l := len(store.entries)
	defer store.RUnlock()
	return l
}

// lockless call
func (store *QueueStore[_]) del(key string) error {
	err := os.Remove(filepath.Join(store.directory, key+store.fileExt))

	// Delete as entry no matter the result
	delete(store.entries, key)

	return err
}

// List - lists all files registered in the store.

	}

	loadUserCalled := false
	select {
	case <-sys.configLoaded:
	default:
		sys.store.LoadUser(ctx, name)
		loadUserCalled = true
	}

	userInfo, err := sys.store.GetUserInfo(name)
	if err == errNoSuchUser && !loadUserCalled {
		sys.store.LoadUser(ctx, name)
		userInfo, err = sys.store.GetUserInfo(name)
	}
	return userInfo, err
}

	}
	return target.isActive()
}

// Store returns any underlying store if set.
func (target *WebhookTarget) Store() event.TargetStore {
	return target.store
}

func (target *WebhookTarget) isActive() (bool, error) {
	conn, err := net.DialTimeout("tcp", target.addr, 5*time.Second)
	if err != nil {
		if xnet.IsNetworkOrHostDown(err, false) {
			return false, store.ErrNotConnected
		}
		return false, err
	}

type KafkaTarget struct {
	initOnce once.Init

	id         event.TargetID
	args       KafkaArgs
	client     sarama.Client
	producer   sarama.SyncProducer
	config     *sarama.Config
	store      store.Store[event.Event]
	batch      *store.Batch[string, *sarama.ProducerMessage]
	loggerOnce logger.LogOnce
	quitCh     chan struct{}
}

// ID - returns target ID.
func (target *KafkaTarget) ID() event.TargetID {

			return nil, fmt.Errorf("unable to initialize the queue store of NATS `%s`: %w", id, err)
		}
	}

	target := &NATSTarget{
		id:         event.TargetID{ID: id, Name: "nats"},
		args:       args,
		loggerOnce: loggerOnce,
		store:      queueStore,
		quitCh:     make(chan struct{}),
	}

	if target.store != nil {
		store.StreamItems(target.store, target, target.quitCh, target.loggerOnce)
	}