{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
        let attrs = item_tree.top_level_attrs(self.db, self.def_map.krate);
        let item_tree = self.db.file_item_tree(file_id.into());
        let crate_data = Arc::get_mut(&mut self.def_map.data).unwrap();