{"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
        let (progress_sender, progress_receiver) = crossbeam_channel::unbounded();
    let (def_map_work_sender, import_map_work_sender, symbols_work_sender, progress_receiver) = {
        let (def_map_work_sender, def_map_work_receiver) = crossbeam_channel::unbounded();