code: def DbUnExportEvent(self, argin):
          
          self._log.debug("In DbUnExportEvent()")
          event_name = argin[0].lower()
          self.db.unexport_event(event_name)
docs: Mark one event channel as non exported in database
  
          :param argin: name of event channel or factory to unexport
          :type: tango.DevString
          :return: none
          :rtype: tango.DevVoid