func (b *Batch[I]) Add(item I) error {
	b.Lock()
	defer b.Unlock()

	if b.isFull() {
		if b.store == nil {
			return ErrBatchFull
		}
		// commit batch to store
		if err := b.commit(); err != nil {
			return err
		}
	}

	b.items = append(b.items, item)
	return nil
}

// Len returns the no of items in the batch
func (b *Batch[_]) Len() int {
	b.Lock()
	defer b.Unlock()

	for i, test := range fromContentMD5Tests {
		ETag, err := FromContentMD5(test.Header)
		if err != nil && !test.ShouldFail {
			t.Fatalf("Test %d: failed to convert Content-MD5 to ETag: %v", i, err)
		}
		if err == nil && test.ShouldFail {
			t.Fatalf("Test %d: should have failed but succeeded", i)
		}
		if err == nil {
			if !Equal(ETag, test.ETag) {
				t.Fatalf("Test %d: got %q - want %q", i, ETag, test.ETag)
			}

		list.targets[target.ID()] = target
	}

	return nil
}

// Lookup - checks whether target by target ID exists is valid or not.
func (list *TargetList) Lookup(arnStr string) (Target, error) {
	list.RLock()
	defer list.RUnlock()

	arn, err := ParseARN(arnStr)
	if err != nil {
		return nil, err
	}

	id, found := list.targets[arn.TargetID]
	if !found {
		return nil, &ErrARNNotFound{}
	}
	return id, nil
}

func NewManager(ctx context.Context, o ManagerOptions) (*Manager, error) {
	found := false
	if o.AuthToken == nil {
		return nil, fmt.Errorf("grid: AuthToken not set")
	}
	if o.Dialer == nil {
		return nil, fmt.Errorf("grid: Dialer not set")
	}
	if o.AuthFn == nil {
		return nil, fmt.Errorf("grid: AuthFn not set")
	}
	m := &Manager{
		ID:        uuid.New(),

)

func buildS3Client(endpoint, accessKey, secretKey string, insecure bool) (*minio.Client, error) {
	u, err := url.Parse(endpoint)
	if err != nil {
		return nil, err
	}

	secure := strings.EqualFold(u.Scheme, "https")
	transport, err := minio.DefaultTransport(secure)
	if err != nil {
		return nil, err
	}
	if insecure {
		// skip TLS verification
		transport.TLSClientConfig.InsecureSkipVerify = true
	}

		{
			[]error{
				errFileNotFound, errFileNotFound, errFileNotFound,
				errFileNotFound, errFileNotFound, nil, nil, nil, nil, nil,
			},
			nil, nil,
		},
		// Checks if wrapped context cancellation errors are grouped as one.
		{canceledErrs, nil, context.Canceled},
	}
	// Validates list of all the testcases for returning valid errors.
	for i, testCase := range testCases {

	scStr := string(b)
	if scStr == "" {
		return nil
	}
	s, err := parseStorageClass(scStr)
	if err != nil {
		return err
	}
	sc.Parity = s.Parity
	return nil
}

// MarshalText - marshals storage class string.
func (sc *StorageClass) MarshalText() ([]byte, error) {
	if sc.Parity != 0 {
		return fmt.Appendf(nil, "%s:%d", schemePrefix, sc.Parity), nil
	}
	return []byte{}, nil
}

	for index := range globalNotificationSys.peerClients {
		if globalNotificationSys.peerClients[index] == nil {
			continue
		}
		go func(index int) {
			for i := 0; i < connectionsPerPeer; i++ {
				wg.Add(1)
				go func() {
					defer wg.Done()
					err := globalNotificationSys.peerClients[index].DevNull(ctx, r)
					if err != nil {

	if atEOF && len(data) == 0 {
		return 0, nil, nil
	}
	if i := bytes.IndexByte(data, '\n'); i >= 0 {
		// We have a full newline-terminated line.
		return i + 1, dropCR(data[0:i]), nil
	}
	// If we're at EOF, we have a final, non-terminated line. Return it.
	if atEOF {
		return len(data), dropCR(data), nil
	}
	// Request more data.
	return 0, nil, nil
}

			}
			if err := manager.Connection(remote).WaitForConnect(ctx); err != nil {
				panic(err)
			}
		}
	}
}

func getHosts(n int) (hosts []string, listeners []net.Listener, err error) {
	for range n {
		l, err := net.Listen("tcp", "127.0.0.1:0")
		if err != nil {
			if l, err = net.Listen("tcp6", "[::1]:0"); err != nil {
				return nil, nil, fmt.Errorf("httptest: failed to listen on a port: %v", err)
			}
		}