{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
        let item_span = self.tcx.def_span(item_id.to_def_id());
    fn check_item(&mut self, item_id: LocalDefId) {
        let def_path_hash = self.tcx.def_path_hash(item_id.to_def_id());