code: public static Request newStatusUpdateRequest(Session session, String message, Callback callback) {
          return newStatusUpdateRequest(session, message, (String)null, null, callback);
      }
docs: Creates a new Request configured to post a status update to a user's feed.
  
  @param session
  the Session to use, or null; if non-null, the session must be in an opened state
  @param message
  the text of the status update
  @param callback
  a callback that will be called when the request is completed to handle success or error conditions
  @return a Request that is ready to execute