def METHOD_NAME(german_credit_data: Dataset):
    def transform_without_annotation(x: pd.Series) -> pd.Series:
        x.credit_amount = -2
        return x
    ds = german_credit_data.transform(transform_without_annotation)
    assert np.all(ds.df.credit_amount == -2)
    assert len(german_credit_data.df) == 1000
    assert len(german_credit_data.df.credit_amount.unique()) > 1