func isStandardHeader(matchHeaderKey string) bool {
	return equals(matchHeaderKey, standardHeaders...)
}

// returns whether object version is a deletemarker and if object qualifies for replication
func checkReplicateDelete(ctx context.Context, bucket string, dobj ObjectToDelete, oi ObjectInfo, delOpts ObjectOptions, gerr error) (dsc ReplicateDecision) {
	rcfg, err := getReplicationConfig(ctx, bucket)
	if err != nil || rcfg == nil {

	opts.SetEvalMetadataFn(func(oi *ObjectInfo, gerr error) (dsc ReplicateDecision, err error) {
		if replica { // no need to check replication on receiver
			return dsc, nil
		}
		dsc = checkReplicateDelete(ctx, bucket, ObjectToDelete{
			ObjectV: ObjectV{
				ObjectName: object,
				VersionID:  opts.VersionID,
			},
		}, *oi, opts, gerr)
		// Mutations of objects on versioning suspended buckets