{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
            let args = ty::GenericArgs::identity_for_item(tcx, sig_id);
        | (FnKind::AssocTrait, FnKind::AssocTrait) => {
            build_generic_args(tcx, sig_id, def_id, args)