return cfg.Clone()
}

type connLRU struct {
	ll *list.List // list.Element.Value type is of *persistConn
	m  map[*persistConn]*list.Element
}

// add adds pc to the head of the linked list.
func (cl *connLRU) add(pc *persistConn) {
	if cl.ll == nil {
		cl.ll = list.New()
		cl.m = make(map[*persistConn]*list.Element)
	}
	ele := cl.ll.PushFront(pc)
	if _, ok := cl.m[pc]; ok {

	}
	for _, goFile := range files {
		if filepath.Ext(goFile.Name()) == ".go" {
			filter = append(filter, goFile)
		}
	}
	return filter, nil
}

var packageRE = regexp.MustCompile(`(?m)^package ([\p{Lu}\p{Ll}\w]+)`)

func getPackageNameFromSource(fn string) (string, error) {
	data, err := os.ReadFile(fn)
	if err != nil {
		return "", err
	}
	pkgname := packageRE.FindStringSubmatch(string(data))

          "fenh--nx??r-datsgrt--n...

          "fenh--nx??r-datsgrt--n...