{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
            //     `&'b T`. In this case, `'a` is actually irrelevant.
            //     too strong. Consider a coercion from `&'a &'x Rc<T>` to
            //     The pointer we want is `LUB('x, 'b`). If we choose `LUB('a,'b)`