code: private void remainChangesBack(PlainChangesLog cLog)
     {
        changesLog.addAll(cLog.getAllStates());
        if (LOG.isDebugEnabled())
        {
           LOG.debug(" ----- rollback ----- \n" + cLog.dump());
        }
     }
docs: Save changes log records back in the session changes log.
  <p>
  Case of Session.save error.
  
  @param cLog