{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"ty::Binder::bind_with_vars("}]}
            ty::Binder::bind_with_vars(
            let bound_vars = tcx.late_bound_vars(constraint.hir_id);
                self.lower_return_type_notation_ty(candidate, assoc_item.def_id, path_span)?.into(),