code: public static void sendAttention (DObject speakObj, String bundle, String message)
      {
          sendSystem(speakObj, bundle, message, SystemMessage.ATTENTION);
      }
docs: Sends a system ATTENTION message notification to the specified object with the supplied
  message content. A system message is one that will be rendered where the speak messages are
  rendered, but in a way that makes it clear that it is a message from the server.
  
  Attention messages are sent when something requires user action that did not result from
  direct action by the user.
  
  @param speakObj the object on which to deliver the message.
  @param bundle the name of the localization bundle that should be used to translate this
  system message prior to displaying it to the client.
  @param message the text of the message.