code: def _get_fashion_mnist(directory):
    
    # Fashion mnist files have the same names as MNIST.
    # We must choose a separate name (by adding 'fashion-' prefix) in the tmp_dir.
    for filename in [
        _MNIST_TRAIN_DATA_FILENAME, _MNIST_TRAIN_LABELS_FILENAME,
        _MNIST_TEST_DATA_FILENAME, _MNIST_TEST_LABELS_FILENAME
    ]:
      generator_utils.maybe_download(directory,
                                     _FASHION_MNIST_LOCAL_FILE_PREFIX + filename,
                                     _FASHION_MNIST_URL + filename)
docs: Download all FashionMNIST files to directory unless they are there.