def METHOD_NAME(german_credit_data: Dataset):
    assert len(german_credit_data.df) == 1000
    ds = (
        german_credit_data.slice(filter_without_parenthesis)
        .transform(lambda i: i / 5, cell_level=True, column_name="credit_amount")
        .slice(filter_with_parenthesis)
    )
    assert len(german_credit_data.df) == 1000
    assert len(ds.df) == 188