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: service_v2.go
    path of file: ./repos/docker-ce/components/cli/vendor/github.com/docker/docker/registry
    
    the code of the file until where you have to start completion: package registry // import "github.com/docker/docker/registry"

import (
	"net/url"
	"strings"

	"github.com/docker/go-connections/tlsconfig"
)

func (s *DefaultService) lookupV2Endpoints(hostname string) (endpoints []APIEndpoint, err error) {
	tlsConfig := tlsconfig.ServerDefault()
	if hostname == DefaultNamespace || hostname == IndexHostname {
		for _, mirror := range s.config.Mirrors {
			if !strings.HasPrefix(mirror, "http://") && !strings.HasPrefix(mirror, "https://") {
				mirror = "https://" + mirror
			}
			mirrorURL, err := url.Parse(mirror)
		
    
func (s *DefaultService) lookupV2Endpoints(hostname string) (endpoints []APIEndpoint, err error) {
	tlsConfig := tlsconfig.ServerDefault()
	if hostname == DefaultNamespace || hostname == IndexHostname {
		for _, mirror := range s.config.Mirrors {
			if !strings.HasPrefix(mirror, "http://") && !strings.HasPrefix(mirror, "https://") {
				mirror = "https://" + mirror
			}
			mirrorURL, err := url.Parse(mirror)
			if err != nil {
				return nil, err
			}
			mirrorTLSConfig, err := s.tlsConfigForMirror(mirrorURL)
			if err != nil {
				return nil, err
			}
			endpoints = append(endpoints, APIEndpoint{
				URL:          mirrorURL,
				Version:      APIVersion2,
				Mirror:       true,
				TrimHostname: true,
				TLSConfig:    mirrorTLSConfig,
			})
		}
		endpoints = append(endpoints, APIEndpoint{
			URL:          DefaultV2Registry,
			Version:      APIVersion2,
			Official:     true,
			TrimHostname: true,
			TLSConfig:    tlsConfig,
		})

		return endpoints, nil
	}

	ana := allowNondistributableArtifacts(s.config, hostname)

	tlsConfig, err = s.tlsConfig(hostname)
	if err != nil {
		return nil, err
	}

	endpoints = []APIEndpoint{
		{
			URL: &url.URL{
				Scheme: "https",
				Host:   hostname,
			},
			Version:                        APIVersion2,
			AllowNondistributableArtifacts: ana,
			TrimHostname:                   true,
			TLSConfig:                      tlsConfig,
		},
	}

	if tlsConfig.InsecureSkipVerify {
		endpoints = append(endpoints, APIEndpoint{
			URL: &url.URL{
				Scheme: "http",
				Host:   hostname,
			},
			Version:                        APIVersion2,
			AllowNondistributableArtifacts: ana,
			TrimHostname:                   true,
			// used to check if supposed to be secure via InsecureSkipVerify
			TLSConfig: tlsConfig,
		})
	}

	return endpoints, nil
}