code: func (c *Host) PullImages(repository, configDir, version string, tufDB io.Reader, ch chan *ct.ImagePullInfo) (stream.Stream, error) {
  	header := http.Header{"Content-Type": {"application/octet-stream"}}
  	query := make(url.Values)
  	query.Set("repository", repository)
  	query.Set("config-dir", configDir)
  	query.Set("version", version)
  	path := "/host/pull/images?" + query.Encode()
  	return c.c.StreamWithHeader("POST", path, header, tufDB, ch)
  }
docs: // PullImages pulls images from a TUF repository using the local TUF file in tufDB