You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: rdv.go
    path of file: ./repos/streamdal/apps/server/vendor/github.com/dgryski/go-rendezvous
    
    the code of the file until where you have to start completion: package rendezvous

type Rendezvous struct {
	nodes map[string]int
	nstr  []string
	nhash []uint64
	hash  Hasher
}

type Hasher func(s string) uint64

func New(nodes []string, hash Hasher) *Rendezvous {
	
    
func (r *Rendezvous) Lookup(k string) string {
	// short-circuit if we're empty
	if len(r.nodes) == 0 {
		return ""
	}

	khash := r.hash(k)

	var midx int
	var mhash = xorshiftMult64(khash ^ r.nhash[0])

	for i, nhash := range r.nhash[1:] {
		if h := xorshiftMult64(khash ^ nhash); h > mhash {
			midx = i + 1
			mhash = h
		}
	}

	return r.nstr[midx]
}