def send_batch_to_parent(indices):
            batch = np_get_batch(
                indices=indices,
                dataset=dataset,
                cols_to_retain=cols_to_retain,
                collate_fn=collate_fn,
                collate_fn_args=collate_fn_args,
                columns_to_np_types=columns_to_np_types,
                return_dict=True,
            )