code: private ServerTarget findTargetServer(String address,
                                          int port)
    {
      for (ServerTarget target : _targets) {
        ServerBartender server = target.getServer();
        
        if (address.equals(server.getAddress()) && port == server.port()) {
          return target;
        }
      }
      
      return null;
    }
docs: /*
  private UpdateServerHeartbeat createMessage(ServerHeartbeat server)
  {
  return new UpdateServerHeartbeat(server);
  }