code: func printIdentities(entity *openpgp.Entity) {
  	lines := []string{"signature verified:"}
  	for _, v := range entity.Identities {
  		lines = append(lines, fmt.Sprintf("  %s", v.Name))
  	}
  	log.Print(strings.Join(lines, "\n"))
  }
docs: // printIdentities prints a message that signature was verified.