code: def call_next(self, *args, **kwargs) -> t.List[run.RunInfo]:
          
          all_results = []
          for ext in self.next_extensions:
              LOG.debug("  %s ", ext)
              results = ext(*args, **kwargs)
              LOG.debug("  %s => %s", ext, results)
              if results is None:
                  LOG.warning("No result from: %s", ext)
                  continue
              result_list = []
              if isinstance(results, c.Iterable):
                  result_list.extend(results)
              else:
                  result_list.append(results)
              all_results.extend(result_list)
  
          return all_results
docs: Call all child extensions with the given arguments.
  
          This calls all child extensions and collects the results for
          our own parent. Use this to control the execution of your
          nested extensions from your own extension.
  
          Returns:
              :obj:`list` of :obj:`RunInfo`: A list of collected
                  results of our child extensions.