code: def _run_parallel_process(self, start_path, stop_path, queue):
          
          process_num = int(current_process().name.split('-', 2)[1])
          self._run_process(start_path, stop_path, process_num)
          queue.put(self.consumer.put())
docs: The function calls _run_process and puts results produced by
          consumer at observations of top most consumer in to the queue