code: func SignArmor62(version Version, plaintext []byte, signer SigningSecretKey, brand string) (string, error) {
  	buf, err := signToStream(version, plaintext, signer, applyBrand(NewSignArmor62Stream, brand))
  	if err != nil {
  		return "", err
  	}
  	return buf.String(), nil
  }
docs: // SignArmor62 creates an attached armored signature message of plaintext from signer.