Function polars_core::frame::groupby::aggregations::_agg_helper_idx

pub fn _agg_helper_idx<T, F>(groups: &GroupsIdx, f: F) -> Serieswhere
    F: Fn((IdxSize, &Vec<IdxSize>)) -> Option<T::Native> + Send + Sync,
    T: PolarsNumericType,
    ChunkedArray<T>: IntoSeries,