{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"self.node_id_to_def_id.insert(node_id,"}]}
            self.node_id_to_def_id.insert(node_id, feed.downgrade());
            debug!("create_def: def_id_to_node_id[{:?}] <-> {:?}", def_id, node_id);
        }