pub fn binary_elementwise_for_each<'a, 'b, T, U, F>(
lhs: &'a ChunkedArray<T>,
rhs: &'b ChunkedArray<U>,
op: F,
)where
T: PolarsDataType,
U: PolarsDataType,
F: FnMut(Option<<T as PolarsDataType>::Physical<'a>>, Option<<U as PolarsDataType>::Physical<'b>>),