Function _rolling_apply_agg_window_nulls 

pub fn _rolling_apply_agg_window_nulls<Agg, T, O, Out>(
    values: &[T],
    validity: &Bitmap,
    offsets: O,
    params: Option<RollingFnParams>,
) -> PrimitiveArray<Out>
where
    O: Iterator<Item = (u32, u32)> + TrustedLen,
    Agg: RollingAggWindowNulls<T, Out>,
    T: IsFloat + NativeType,
    Out: NativeType,