code: def saved_groups(self):
          
          if self._saved_groups is None:
              self._saved_groups = False
              fqfn_saved = os.path.join(self.tcex.args.tc_temp_path, 'groups-saved')
              if (
                  self.enable_saved_file
                  and os.path.isfile(fqfn_saved)
                  and os.access(fqfn_saved, os.R_OK)
              ):
                  self._saved_groups = True
                  self.tcex.log.debug('groups-saved file found')
          return self._saved_groups
docs: Return True if saved group files exits, else False.