{"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
        let normalize_impl_ty_args = ty::GenericArgs::identity_for_item(tcx, container_id)
        // Extend the impl's identity args with late-bound GAT vars
            .extend_to(tcx, impl_ty.def_id, |param, _| match param.kind {