{"ast_node_type":"variable","tokens":[{"end":26,"kind":"keyword","start":0,"text":"let"}]}
        let rebased_args =
            tcx.type_of(impl_ty.def_id).instantiate(tcx, normalize_impl_ty_args);
            normalize_impl_ty_args.rebase_onto(tcx, container_id, impl_trait_ref.args);