code: func (cli *DockerCli) NotaryClient(imgRefAndAuth trust.ImageRefAndAuth, actions []string) (notaryclient.Repository, error) {
  	return trust.GetNotaryRepository(cli.In(), cli.Out(), UserAgent(), imgRefAndAuth.RepoInfo(), imgRefAndAuth.AuthConfig(), actions...)
  }
docs: // NotaryClient provides a Notary Repository to interact with signed metadata for an image