code: func (r *ProtoKeyValWrapper) GetValue(value proto.Message) error {
  	err := r.ProtoKeyVal.GetValue(value)
  	if err != nil {
  		return err
  	}
  	_, err = r.decrypter.Decrypt(value, r.decryptFunc)
  	return err
  }
docs: // GetValue returns the value of the pair.