{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"fn_abi_request:"}]}
        fn_abi_request: FnAbiRequest<'tcx>,
        span: Span,
    ) -> <Self::FnAbiOfResult as MaybeResult<&'tcx FnAbi<'tcx, Ty<'tcx>>>>::Error;