{"ast_node_type":"other","tokens":[{"end":25,"kind":"keyword","start":0,"text":"Ok(decl)"}]}
            Ok(decl) => {
        match self.parse_fn_decl(|_| false, AllowPlus::No, RecoverReturnSign::OnlyFatArrow) {
                self.dcx().emit_err(ExpectedFnPathFoundFnKeyword { fn_token_span });