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: load.go
    path of file: ./repos/hysteria/extras/outbounds/acl/v2geo
    
    the code of the file until where you have to start completion: package v2geo

import (
	"os"
	"strings"

	"google.golang.org/protobuf/proto"
)

// LoadGeoIP loads a GeoIP data file and converts it to 
    
func LoadGeoSite(filename string) (map[string]*GeoSite, error) {
	bs, err := os.ReadFile(filename)
	if err != nil {
		return nil, err
	}
	var list GeoSiteList
	if err := proto.Unmarshal(bs, &list); err != nil {
		return nil, err
	}
	m := make(map[string]*GeoSite)
	for _, entry := range list.Entry {
		m[strings.ToLower(entry.CountryCode)] = entry
	}
	return m, nil
}