{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":")"}]}
    ) -> <Self as FnAbiOfHelpers<'tcx>>::FnAbiOfResult {
        extra_args: &'tcx ty::List<Ty<'tcx>>,
        let _span = enter_trace_span!(M, layouting::fn_abi_of_instance, ?instance, ?extra_args);