for _, k := range []string{
		key,
		strings.ToLower(key),
		http.CanonicalHeaderKey(key),
	} {
		v, ok := m[k]
		if ok {
			return v, ok
		}
	}
	return "", false
}

func putReplicationOpts(ctx context.Context, sc string, objInfo ObjectInfo) (putOpts minio.PutObjectOptions, isMP bool, err error) {
	meta := make(map[string]string)
	isSSEC := crypto.SSEC.IsEncrypted(objInfo.UserDefined)

func batchReplicationOpts(ctx context.Context, sc string, objInfo ObjectInfo) (putOpts minio.PutObjectOptions, isMP bool, err error) {
	// TODO: support custom storage class for remote replication
	putOpts, isMP, err = putReplicationOpts(ctx, "", objInfo)
	if err != nil {
		return putOpts, isMP, err
	}
	putOpts.Internal = minio.AdvancedPutOptions{
		SourceVersionID:    objInfo.VersionID,
		SourceMTime:        objInfo.ModTime,