(self, data_fetcher)
Set the data fetcher.

        Args:
            data_fetcher (DataFetcher): set the data fetcher.
Set the data fetcher.
Set the data fetcher .
def set_data_fetcher(self, data_fetcher):
        """Set the data fetcher.

        Args:
            data_fetcher (DataFetcher): set the data fetcher.
        """
        self._data_fetcher = data_fetcher
def set_data_fetcher ( self , data_fetcher ) : self . _data_fetcher = data_fetcher