if ok := wildcard.MatchSimple(pattern, matchStr); ok {
			return true
		}
	}
	return false
}

// Returns the part file name which matches the partNumber and etag.
func getPartFile(entriesTrie *trie.Trie, partNumber int, etag string) (partFile string) {
	for _, match := range entriesTrie.PrefixMatch(fmt.Sprintf("%.5d.%s.", partNumber, etag)) {
		partFile = match
		break
	}
	return partFile
}