{"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"let"}]}
                            let def_map = crate_def_map(self.db, def_id.krate);
                        if def_id.krate != self.def_map.krate {
                            if let Some(helpers) = def_map.data.exported_derives.get(&macro_id) {