code: public void execute(Form form) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
          executeAction(Action.execute, form);
      }
docs: Executes the default action of the command with the information provided
  in the Form. This form must be the answer form of the previous stage. If
  there is a problem executing the command it throws an XMPPException.
  
  @param form the form answer of the previous stage.
  @throws XMPPErrorException if an error occurs.
  @throws NoResponseException if there was no response from the server.
  @throws NotConnectedException
  @throws InterruptedException