/**
  * Helper method to disable carbons.
  *
  * @throws XMPPException
  * @throws SmackException if there was no response from the server.
  */
 public void disableCarbons() throws XMPPException, SmackException {
   setCarbonsEnabled(false);
 }
 /**
  * Helper method to enable carbons.
  *
  * @throws XMPPException
  * @throws SmackException if there was no response from the server.
  */
 public void enableCarbons() throws XMPPException, SmackException {
   setCarbonsEnabled(true);
 }