Type Alias BoxedOrdering 

pub type BoxedOrdering<'a, QS, DB> = Box<dyn BoxableExpression<QS, DB, SqlType = NotSelectable> + 'a>;

An ordering on the table QS, boxed for a boxed query’s then_order_by.

Aliased Type

pub struct BoxedOrdering<'a, QS, DB>(/* private fields */);