Trait polars::prelude::datatypes::CategoricalMergeOperation   
source · pub trait CategoricalMergeOperation {
    // Required method
    fn finish(
        self,
        lhs: &ChunkedArray<UInt32Type>,
        rhs: &ChunkedArray<UInt32Type>
    ) -> Result<ChunkedArray<UInt32Type>, PolarsError>;
}