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: repository.go
    path of file: ./repos/moby/vendor/github.com/docker/distribution/registry/client
    
    the code of the file until where you have to start completion: package client

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"net/url"
	"strconv"
	"strings"
	"time"

	"github.com/distribution/reference"
	"github.com/docker/distribution"
	v2 "github.com/docker/distribution/registry/api/v2"
	"github.com/docker/distribution/registry/client/transport"
	"github.com/docker/distribution/registry/storage/cache"
	"github.com/docker/distribution/registry/storage/cache/memory"
	"github.com/opencontainers/go-digest"
)

// Registry provides an interface for calling Repositories, which returns a catalog of repositories.
type Registry interface {
	Repositories(ctx context.Context, repos []string, last string) (n int, err error)
}

// checkHTTPRedirect is a callback that can manipulate redirected HTTP
// requests. It is used to preserve Accept and Range headers.
func checkHTTPRedirect(req *http.Request, via []*http.Request) error {
	if len(via) >= 10 {
		return errors.New("stopped after 10 redirects")
	}

	if len(via) > 0 {
		for headerName, headerVals := range via[0].Header {
			if headerName != "Accept" && headerName != "Range" {
				continue
			}
			for _, val := range headerVals {
				// Don't add to redirected request if redirected
				// request already has a header with the same
				// name and value.
				hasValue := false
				for _, existingVal := range req.Header[headerName] {
					if existingVal == val {
						hasValue = true
						break
					}
				}
				if !hasValue {
					req.Header.Add(headerName, val)
				}
			}
		}
	}

	return nil
}

// NewRegistry creates a registry namespace which can be used to get a listing of repositories
func NewRegistry(baseURL string, transport http.RoundTripper) (Registry, error) {
	ub, err := v2.NewURLBuilderFromString(baseURL, false)
	if err != nil {
		return nil, err
	}

	client := &http.Client{
		Transport:     transport,
		Timeout:       1 * 
    
func (ms *manifests) Get(ctx context.Context, dgst digest.Digest, options ...distribution.ManifestServiceOption) (distribution.Manifest, error) {
	var (
		digestOrTag string
		ref         reference.Named
		err         error
		contentDgst *digest.Digest
		mediaTypes  []string
	)

	for _, option := range options {
		switch opt := option.(type) {
		case distribution.WithTagOption:
			digestOrTag = opt.Tag
			ref, err = reference.WithTag(ms.name, opt.Tag)
			if err != nil {
				return nil, err
			}
		case contentDigestOption:
			contentDgst = opt.digest
		case distribution.WithManifestMediaTypesOption:
			mediaTypes = opt.MediaTypes
		default:
			err := option.Apply(ms)
			if err != nil {
				return nil, err
			}
		}
	}

	if digestOrTag == "" {
		digestOrTag = dgst.String()
		ref, err = reference.WithDigest(ms.name, dgst)
		if err != nil {
			return nil, err
		}
	}

	if len(mediaTypes) == 0 {
		mediaTypes = distribution.ManifestMediaTypes()
	}

	u, err := ms.ub.BuildManifestURL(ref)
	if err != nil {
		return nil, err
	}

	req, err := http.NewRequest("GET", u, nil)
	if err != nil {
		return nil, err
	}

	for _, t := range mediaTypes {
		req.Header.Add("Accept", t)
	}

	if _, ok := ms.etags[digestOrTag]; ok {
		req.Header.Set("If-None-Match", ms.etags[digestOrTag])
	}

	resp, err := ms.client.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	if resp.StatusCode == http.StatusNotModified {
		return nil, distribution.ErrManifestNotModified
	} else if SuccessStatus(resp.StatusCode) {
		if contentDgst != nil {
			dgst, err := digest.Parse(resp.Header.Get("Docker-Content-Digest"))
			if err == nil {
				*contentDgst = dgst
			}
		}
		mt := resp.Header.Get("Content-Type")
		body, err := ioutil.ReadAll(resp.Body)

		if err != nil {
			return nil, err
		}
		m, _, err := distribution.UnmarshalManifest(mt, body)
		if err != nil {
			return nil, err
		}
		return m, nil
	}
	return nil, HandleErrorResponse(resp)
}