func Multipart(etags ...ETag) ETag {
	if len(etags) == 0 {
		return nil
	}

	var n int64
	h := md5.New()
	for _, etag := range etags {
		if !etag.IsMultipart() && !etag.IsEncrypted() {
			h.Write(etag)
			n++
		}
	}
	etag := append(h.Sum(nil), '-')
	return strconv.AppendInt(etag, n, 10)
}

// Set adds the ETag to the HTTP headers. It overwrites any
// existing ETag entry.
//

		ETags:     []ETag{},
		Multipart: ETag{},
	},
	{
		ETags:     []ETag{must("b10a8db164e0754105b7a99be72e3fe5")},
		Multipart: must("7b976cc68452e003eec7cb0eb631a19a-1"),
	},
	{
		ETags:     []ETag{must("5f363e0e58a95f06cbe9bbc662c5dfb6"), must("5f363e0e58a95f06cbe9bbc662c5dfb6")},
		Multipart: must("a7d414b9133d6483d9a1c4e04e856e3b-2"),
	},
	{

	"bytes"
	"context"
	"time"

	"github.com/minio/madmin-go/v3"
)

func commonETags(etags []string) (etag string, maxima int) {
	etagOccurrenceMap := make(map[string]int, len(etags))

	// Ignore the uuid sentinel and count the rest.
	for _, etag := range etags {
		if etag == "" {
			continue
		}
		etagOccurrenceMap[etag]++
	}

	maxima = 0 // Counter for remembering max occurrence of elements.
	latest := ""

	return partKey
}

// SealETag seals the etag using the object key.
// It does not encrypt empty ETags because such ETags indicate
// that the S3 client hasn't sent an ETag = MD5(object) and
// the backend can pick an ETag value.
func (key ObjectKey) SealETag(etag []byte) []byte {
	if len(etag) == 0 { // don't encrypt empty ETag - only if client sent ETag = MD5(object)
		return etag
	}
	var buffer bytes.Buffer

		}
		if _, err := strconv.ParseInt(object.ETag[i+1:], 10, 32); err != nil {
			return "", errObjectTampered
		}
		return object.ETag, nil
	}

	etag, err := hex.DecodeString(object.ETag)
	if err != nil {
		return "", err
	}
	etag, err = key.UnsealETag(etag)
	if err != nil {
		return "", err
	}
	return hex.EncodeToString(etag), nil
}

	sum := r.md5.Sum(nil)
	return ETag(sum)
}

// VerifyError is an error signaling that a
// computed ETag does not match an expected
// ETag.
type VerifyError struct {
	Expected ETag
	Computed ETag
}

func (v VerifyError) Error() string {
	return fmt.Sprintf("etag: expected ETag %q does not match computed ETag %q", v.Expected, v.Computed)
}

// UUIDHash - use uuid to make md5sum

	// However, in case of encryption, the persisted part ETags don't match
	// what we have sent to the client during PutObjectPart. The reason is
	// that ETags are encrypted. Hence, the client will send a list of complete
	// part ETags of which non can match the ETag of any part. For example
	//   ETag (client):          30902184f4e62dd8f98f0aaff810c626

			if len(etag) >= 32 && strings.Count(etag, "-") != 1 {
				etag = etag[len(etag)-32:]
			}
		}
	}

	// We must not use the http.Header().Set method here because some (broken)
	// clients expect the ETag header key to be literally "ETag" - not "Etag" (case-sensitive).
	// Therefore, we have to set the ETag directly as map entry.
	w.Header()[xhttp.ETag] = []string{"\"" + etag + "\""}

		ETag:       "",
		ShouldFail: true, // ETag is not a valid hex value
	},
	{
		ObjectKey:  [32]byte{},
		ObjectInfo: ObjectInfo{ETag: "00000f00f27834c9a2654927546df57f9e998187496394d4ee80f3d9978f85f3c7d81f72600cdbe03d80dc5a13d69354"},
		ETag:       "",
		ShouldFail: true, // modified ETag
	},

	// Special tests for ETags that end with a '-x'
	{
		ObjectKey:  [32]byte{},

			MetaSys:            make(map[string][]byte),
			MetaUser:           make(map[string]string, len(fi.Metadata)),
		}
		for i := range fi.Parts {
			// Only add etags if any.
			if fi.Parts[i].ETag != "" {
				ventry.ObjectV2.PartETags = make([]string, len(fi.Parts))
				break
			}
		}
		for i := range fi.Parts {
			// Only add indices if any.
			if len(fi.Parts[i].Index) > 0 {