code: def _configure_dataset(self, data_root: str=None, download_urls: Iterable[str]=None, **kwargs) -> None:
          
          self._data_root = data_root
          self._download_urls = download_urls
docs: Save the passed values and use them as a default property implementation.
  
          :param data_root: directory to which the files will be downloaded
          :param download_urls: list of URLs to be downloaded