code: def run_queue(self, options, todo):
      
      utils.logging_debug('AutoBatcher(%s): %d items',
                          self._todo_tasklet.__name__, len(todo))
      batch_fut = self._todo_tasklet(todo, options)
      self._running.append(batch_fut)
      # Add a callback when we're done.
      batch_fut.add_callback(self._finished_callback, batch_fut, todo)
docs: Actually run the _todo_tasklet.