code: func PackBytesGzip(box string, name string, bb []byte) error {
  	var buf bytes.Buffer
  	w := gzip.NewWriter(&buf)
  	_, err := w.Write(bb)
  	if err != nil {
  		return err
  	}
  	err = w.Close()
  	if err != nil {
  		return err
  	}
  	PackBytes(box, name, buf.Bytes())
  	return nil
  }
docs: // PackBytesGzip packets the gzipped compressed bytes into a box.