return
	}

	_, isEncrypted := crypto.IsEncrypted(mi.UserDefined)

	// Read compression metadata preserved in the init multipart for the decision.
	_, isCompressed := mi.UserDefined[ReservedMetadataPrefix+"compression"]
	// Compress only if the compression is enabled during initial multipart.
	var idxCb func() []byte
	if isCompressed {

			// Storing the compression metadata.
			metadata[ReservedMetadataPrefix+"compression"] = compressionAlgorithmV2
			metadata[ReservedMetadataPrefix+"actual-size"] = strconv.FormatInt(size, 10)

			actualReader, err := hash.NewReader(ctx, reader, size, "", "", actualSize)
			if err != nil {
				return err
			}

			// Set compression metrics.
			wantEncryption := crypto.Requested(r.Header)

	PrefixEnabledFn func(prefix string) bool // function which returns true if versioning is enabled on prefix

	// IndexCB will return any index created but the compression.
	// Object must have been read at this point.
	IndexCB func() []byte

	// InclFreeVersions indicates that free versions need to be included
	// when looking up a version by fi.VersionID
	InclFreeVersions bool