pub fn make_categoricals_compatible(
ca_left: &CategoricalChunked,
ca_right: &CategoricalChunked,
) -> Result<(CategoricalChunked, CategoricalChunked), PolarsError>
pub fn make_categoricals_compatible(
ca_left: &CategoricalChunked,
ca_right: &CategoricalChunked,
) -> Result<(CategoricalChunked, CategoricalChunked), PolarsError>