code: def async_save_result(self):
          
          if hasattr(self, "_async_future") and self._async_future.done():
              self._async_future.result()
              return True
          else:
              return False
docs: Retrieves the result of this subject's asynchronous save.
  
          - Returns `True` if the subject was saved successfully.
          - Raises `concurrent.futures.CancelledError` if the save was cancelled.
          - If the save failed, raises the relevant exception.
          - Returns `False` if the subject hasn't finished saving or if the
            subject has not been queued for asynchronous save.