func (m *metaCacheEntriesSorted) fileInfoVersions(bucket, prefix, delimiter, afterV string) (versions []ObjectInfo) {
	versions = make([]ObjectInfo, 0, m.len())
	prevPrefix := ""
	vcfg, _ := globalBucketVersioningSys.Get(bucket)

	for _, entry := range m.o {
		if entry.isObject() {
			if delimiter != "" {
				idx := strings.Index(strings.TrimPrefix(entry.name, prefix), delimiter)
				if idx >= 0 {