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_agg_helper_slice

polars_core::frame::group_by::aggregations

Function _agg_helper_slice 

Source 
pub fn _agg_helper_slice<T, F>(groups: &[[IdxSize; 2]], f: F) -> Series
where
    F: Fn([IdxSize; 2]) -> Option<T::Native> + Send + Sync,
    T: PolarsNumericType,
Available on crate feature algorithm_group_by only.