{"ast_node_type":"other","tokens":[{"end":113,"kind":"keyword","start":0,"text":"//"}]}
                    //   we will either wind up with `?sig=<Foo<?x> as Trait>::Assoc/?y/ConcreteTy` respectively.
                    // - Depending on whether `<Foo<?x> as Trait>::Assoc` is rigid, ambiguous or normalizeable,
                    //