code: func (g *GPG) ImportPublicKey(ctx context.Context, buf []byte) error {
  	el, err := openpgp.ReadArmoredKeyRing(bytes.NewReader(buf))
  	if err != nil {
  		return err
  	}
  	g.pubring = append(g.pubring, el...)
  	return nil
  }
docs: // ImportPublicKey does nothing