pub fn _get_rows_encoded_arr(
by: &[Column],
descending: &[bool],
nulls_last: &[bool],
) -> Result<BinaryArray<i64>, PolarsError>pub fn _get_rows_encoded_arr(
by: &[Column],
descending: &[bool],
nulls_last: &[bool],
) -> Result<BinaryArray<i64>, PolarsError>