{"ast_node_type":"other","tokens":[{"end":10,"kind":"keyword","start":0,"text":");"}]}
        );
            trait_ref.args.extend_to(tcx, assoc.def_id, |param, _| tcx.mk_param_from_def(param)),
        let fn_sig = tcx.liberate_late_bound_regions(fn_hir_id.expect_owner().to_def_id(), fn_sig);