pub trait HasSumApp<'a, Row, F>: Send {
fn get_sum(
self: Box<Self, Global>
) -> Box<<Row as SumApp<'a, F>>::Applied, Global>
where
F: TyCon,
Row: SumApp<'a, F>;
fn get_sum_borrow(&'b self) -> &'b <Row as SumApp<'a, F>>::Applied
where
F: TyCon,
Row: SumApp<'a, F>;
}