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: internals_windows.go
    path of file: ./repos/docker-ce/components/engine/builder/dockerfile
    
    the code of the file until where you have to start completion: package dockerfile // import "github.com/docker/docker/builder/dockerfile"

import (
	"bytes"
	"os"
	"path/filepath"
	"strings"

	"github.com/containerd/containerd/platforms"
	"github.com/docker/docker/api/types/container"
	"github.com/docker/docker/api/types/mount"
	"github.com/docker/docker/pkg/idtools"
	"github.com/docker/docker/pkg/jsonmessage"
	"golang.org/x/sys/windows"
)

func parseChownFlag(builder *Builder, state *dispatchState, chown, ctrRootPath string, identityMapping *idtools.IdentityMapping) (idtools.Identity, error) {
	if builder.options.Platform == "windows" {
		return getAccountIdentity(builder, chown, ctrRootPath, state)
	}

	return identityMapping.RootPair(), nil
}

func getAccountIdentity(builder *Builder, accountName string, ctrRootPath string, state *dispatchState) (idtools.Identity, error) {
	// If this is potentially a string SID then attempt to convert it to verify
	// this, otherwise continue looking for the account.
	if strings.HasPrefix(accountName, "S-") || strings.HasPrefix(accountName, "s-") {
		sid, err := windows.StringToSid(accountName)

		if err == nil {
			return idtools.Identity{SID: sid.String()}, nil
		}
	}

	// Attempt to obtain the
    
func lookupNTAccount(builder *Builder, accountName string, state *dispatchState) (idtools.Identity, error) {

	source, _ := filepath.Split(os.Args[0])

	target := "C:\\Docker"
	targetExecutable := target + "\\containerutility.exe"

	optionsPlatform, err := platforms.Parse(builder.options.Platform)
	if err != nil {
		return idtools.Identity{}, err
	}

	runConfig := copyRunConfig(state.runConfig,
		withCmdCommentString("internal run to obtain NT account information.", optionsPlatform.OS))

	runConfig.Cmd = []string{targetExecutable, "getaccountsid", accountName}

	hostConfig := &container.HostConfig{Mounts: []mount.Mount{
		{
			Type:     mount.TypeBind,
			Source:   source,
			Target:   target,
			ReadOnly: true,
		},
	},
	}

	container, err := builder.containerManager.Create(runConfig, hostConfig)
	if err != nil {
		return idtools.Identity{}, err
	}

	stdout := new(bytes.Buffer)
	stderr := new(bytes.Buffer)

	if err := builder.containerManager.Run(builder.clientCtx, container.ID, stdout, stderr); err != nil {
		if err, ok := err.(*statusCodeError); ok {
			return idtools.Identity{}, &jsonmessage.JSONError{
				Message: stderr.String(),
				Code:    err.StatusCode(),
			}
		}
		return idtools.Identity{}, err
	}

	accountSid := stdout.String()

	return idtools.Identity{SID: accountSid}, nil
}