{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"c.visit_ty_unambig(self_ty);"}]}
                        c.visit_ty_unambig(self_ty);
                        let mut c = CheckTraitImplStable { tcx: self.tcx, fully_stable: true };
                        c.visit_trait_ref(t);