{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"if"}]}
        if let ProcMacroKind::Derive { helpers } = def.kind {
        let crate_data = Arc::get_mut(&mut self.def_map.data).unwrap();
            crate_data.exported_derives.insert(proc_macro_id.into(), helpers);