func ExpectedExpiryTime(modTime time.Time, days int) time.Time {
	if days == 0 {
		return modTime
	}
	t := modTime.UTC().Add(time.Duration(days+1) * 24 * time.Hour)
	return t.Truncate(24 * time.Hour)
}

// SetPredictionHeaders sets time to expiry and transition headers on w for a
// given obj.
func (lc Lifecycle) SetPredictionHeaders(w http.ResponseWriter, obj ObjectOpts) {
	event := lc.eval(obj, time.Time{})

		return
	}
	bts, err = msgp.ReadExactBytes(bts, (x.VersionID)[:])
	if err != nil {
		err = msgp.WrapError(err, "VersionID")
		return
	}
	x.ModTime, bts, err = msgp.ReadInt64Bytes(bts)
	if err != nil {
		err = msgp.WrapError(err, "ModTime")
		return
	}
	{
		var zb0002 uint8
		zb0002, bts, err = msgp.ReadUint8Bytes(bts)
		if err != nil {
			err = msgp.WrapError(err, "Type")
			return
		}

// Returns false on ties.
func (x xlMetaV2VersionHeader) sortsBefore(o xlMetaV2VersionHeader) bool {
	if x == o {
		return false
	}
	// Prefer newest modtime.
	if x.ModTime != o.ModTime {
		return x.ModTime > o.ModTime
	}

	// The following doesn't make too much sense, but we want sort to be consistent nonetheless.
	// Prefer lower types
	if x.Type != o.Type {
		return x.Type < o.Type
	}

	return
}

func (z xlMetaV2VersionHeaderV2) MarshalJSON() (o []byte, e error) {
	tmp := struct {
		VersionID string
		ModTime   time.Time
		Signature string
		Type      uint8
		Flags     uint8
	}{
		VersionID: hex.EncodeToString(z.VersionID[:]),
		ModTime:   time.Unix(0, z.ModTime),
		Signature: hex.EncodeToString(z.Signature[:]),
		Type:      z.Type,
		Flags:     z.Flags,
	}
	return json.Marshal(tmp)

		}
	}

	modTime = UTCNow() // We only preserve modTime if dstOpts.MTime is true.
	// in all other cases mtime is latest.

	fi.VersionID = versionID // set any new versionID we might have created
	fi.ModTime = modTime     // set modTime for the new versionID
	if !dstOpts.MTime.IsZero() {
		modTime = dstOpts.MTime
		fi.ModTime = dstOpts.MTime
	}

	sort.Slice(files, func(i, j int) bool {
		ii, err := files[i].Info()
		if err != nil {
			return false
		}
		ji, err := files[j].Info()
		if err != nil {
			return true
		}
		return ii.ModTime().Before(ji.ModTime())
	})

	return files, nil

// Clone - Returns a cloned copy of current objectInfo
func (o *ObjectInfo) Clone() (cinfo ObjectInfo) {
	cinfo = ObjectInfo{
		Bucket:                     o.Bucket,
		Name:                       o.Name,
		ModTime:                    o.ModTime,
		Size:                       o.Size,
		IsDir:                      o.IsDir,
		ETag:                       o.ETag,
		VersionID:                  o.VersionID,
		IsLatest:                   o.IsLatest,

		lifeCycle:  &lc,
	}

	modTime := time.Now()
	uuids := make([]uuid.UUID, 5)
	for i := range uuids {
		uuids[i] = uuid.UUID([16]byte{15: uint8(i + 1)})
	}
	fivs := make([]FileInfo, 5)
	for i := 0; i < 5; i++ {
		fivs[i] = FileInfo{
			Volume:      bucket,
			Name:        obj,
			VersionID:   uuids[i].String(),
			IsLatest:    i == 0,
			ModTime:     modTime.Add(-1 * time.Duration(i) * time.Minute),

				Volume:   volume,
				Name:     path,
				Deleted:  true,
				IsLatest: true,
				ModTime:  timeSentinel1970,
			},
		}
	}
	if err != nil {
		return FileInfoVersions{}, err
	}

	return FileInfoVersions{
		Volume:        volume,
		Name:          path,
		Versions:      versions,
		LatestModTime: versions[0].ModTime,
	}, nil
}

type fileInfoOpts struct {
	InclFreeVersions bool

				}
			}
		})
		t.Run(fmt.Sprintf("modtime-q%d", i), func(t *testing.T) {
			// Mutate modtime, but rest is consistent.
			vMod := make([][]xlMetaV2ShallowVersion, 0, len(vers))
			for i, ver := range vers {
				newVers := make([]xlMetaV2ShallowVersion, 0, len(ver))
				for _, v := range ver {
					v.header.ModTime += int64(i)
					newVers = append(newVers, v)
				}