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: urllist.go
    path of file: ./repos/cloud-torrent/vendor/github.com/anacrolix/torrent/metainfo
    
    the code of the file until where you have to start completion: package metainfo

import (
	"github.com/anacrolix/torrent/bencode"
)

type UrlList []string

var (
	_ bencode.Unmarshaler = (*UrlList)(nil)
)

func (me *UrlList) UnmarshalBencode(b []byte) error {

    
func (me *UrlList) UnmarshalBencode(b []byte) error {
	if len(b) == 0 {
		return nil
	}
	if b[0] == 'l' {
		var l []string
		err := bencode.Unmarshal(b, &l)
		*me = l
		return err
	}
	var s string
	err := bencode.Unmarshal(b, &s)
	*me = []string{s}
	return err
}