class Message {

  @Builder
  @Updater
  @Recycle
  Message(String sender,
          String body,
          String recipient,
          String subject) {
    this.sender = sender;
    this.body = body;
    this.recipient = recipient;
    this.subject = subject;
  }

  @Builder @Updater @Recycle  Message(String sender,
          String body,
          String recipient,
          String subject);

}