docs: def _convert_range_to_list(self, tgt):
          '''
          convert a seco.range range into a list target
          '''
          range_ = seco.range.Range(self.opts['range_server'])
          try:
              return range_.expand(tgt)
          except seco.range.RangeException as err:
              print('Range server exception: {0}'.format(err))
              return []