{"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"let"}]}
        let fn_parse_mode = FnParseMode { req_name: |_| true, req_body: true };
    ) -> PResult<'a, Option<Option<P<AssocItem>>>> {
        self.parse_assoc_item(fn_parse_mode, force_collect)