Class Wrapper

datafusion/expr/src/logical_plan/plan.rs:1690–1690

Boilerplate structure to wrap LogicalPlan with something that that can be formatted

        // Boilerplate structure to wrap LogicalPlan with something
        // that that can be formatted
        struct Wrapper<'a>(&'a LogicalPlan);
        impl Display for Wrapper<'_> {
            fn fmt(&self, f: &mut Formatter) -> fmt::Result {
                let with_schema = false;