testCases := []struct {
		etag         string
		expectedETag string
	}{
		{`"8019e762"`, `8019e762-1`},
		{"5d57546eeb86b3eba68967292fba0644", "5d57546eeb86b3eba68967292fba0644-1"},
		{`"8019e762-1"`, `8019e762-1`},
		{"5d57546eeb86b3eba68967292fba0644-1", "5d57546eeb86b3eba68967292fba0644-1"},
	}
	for i, testCase := range testCases {
		etag := ToS3ETag(testCase.etag)
		if etag != testCase.expectedETag {

		Bucket:                     o.Bucket,
		Name:                       o.Name,
		ModTime:                    o.ModTime,
		Size:                       o.Size,
		IsDir:                      o.IsDir,
		ETag:                       o.ETag,
		VersionID:                  o.VersionID,
		IsLatest:                   o.IsLatest,
		DeleteMarker:               o.DeleteMarker,
		TransitionedObject:         o.TransitionedObject,

        "fe012443-6ba9-4ef2-bb94-b729d2060c78/test123/testw3c.pdf/xl.meta": {"Versions":[{"Type":1,"V2Obj":{"ID":"aGEA/ZUOR4ueRIZsA...

	if metadata == nil {
		return map[string]string{MetaMultipart: ""}
	}
	metadata[MetaMultipart] = ""
	return metadata
}

// IsETagSealed returns true if the etag seems to be encrypted.

}

var isETagSealedTests = []struct {
	ETag     string
	IsSealed bool
}{
	{ETag: "", IsSealed: false},                                  // 0
	{ETag: "90682b8e8cc7609c4671e1d64c73fc30", IsSealed: false},  // 1
	{ETag: "f201040c9dc593e39ea004dc1323699bcd", IsSealed: true}, // 2 not valid ciphertext but looks like sealed ETag

}

// Object represents object metadata of the event.
type Object struct {
	Key          string            `json:"key"`
	Size         int64             `json:"size,omitempty"`
	ETag         string            `json:"eTag,omitempty"`
	ContentType  string            `json:"contentType,omitempty"`
	UserMetadata map[string]string `json:"userMetadata,omitempty"`
	VersionID    string            `json:"versionId,omitempty"`

    /**
     * Extension header set by OkHttp specifying the timestamp when the cached HTTP response was
     * first received.
     */
    private var receivedResponseMillis = 0L

    /** Etag of the cached response. */
    private var etag: String? = null

    /** Age of the cached response. */
    private var ageSeconds = -1

    /**
     * Returns true if computeFreshnessLifetime used a heuristic. If we used a heuristic to serve a

		Bucket:      bucket,
		Name:        object,
		Size:        r.Size(),
		IsLatest:    true,
		ContentType: string(mimeXML),
		NumVersions: 1,
		ETag:        etag,
		ModTime:     UTCNow(),
	}, opts)

			if kmsCtx, ok := objInfo.UserDefined[crypto.MetaContext]; ok {
				w.Header().Set(xhttp.AmzServerSideEncryptionKmsContext, kmsCtx)
			}
			if len(objInfo.ETag) >= 32 && strings.Count(objInfo.ETag, "-") != 1 {
				objInfo.ETag = objInfo.ETag[len(objInfo.ETag)-32:]
			}
		case crypto.SSEC:
			w.Header().Set(xhttp.AmzServerSideEncryptionCustomerAlgorithm, r.Header.Get(xhttp.AmzServerSideEncryptionCustomerAlgorithm))

		t.Fatalf("unable to get xl meta")
	}

	// Test them.
	for _, testCase := range testCases {
		if testCase.expectedIndex > -1 {
			partNumString := strconv.Itoa(testCase.partNum)
			fi.AddObjectPart(testCase.partNum, "etag."+partNumString, int64(testCase.partNum+humanize.MiByte), ActualSize, UTCNow(), nil, nil)
		}

		if index := objectPartIndex(fi.Parts, testCase.partNum); index != testCase.expectedIndex {