docs: def _local_call(self, call_conf):
          '''
          Execute local call
          '''
          try:
              ret = self._get_caller(call_conf).call()
          except SystemExit:
              ret = 'Data is not available at this moment'
              self.out.error(ret)
          except Exception as ex:
              ret = 'Unhandled exception occurred: {}'.format(ex)
              log.debug(ex, exc_info=True)
              self.out.error(ret)
  
          return ret