{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
        let def_path_hash = self.tcx.def_path_hash(item_id.to_def_id());
        let item_span = self.tcx.def_span(item_id.to_def_id());
        for attr in self.tcx.get_attrs(item_id, sym::rustc_clean) {