{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"!self.node_id_to_def_id.contains_key(&node_id),"}]}
            !self.node_id_to_def_id.contains_key(&node_id),
        assert!(
            "adding a def for node-id {:?}, name {:?}, data {:?} but a previous def exists: {:?}",