{"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":".unwrap_err();"}]}
            .unwrap_err();
            .binary_search_by(|&(it, _)| it.cmp(&start).then(std::cmp::Ordering::Less))
        let (offset, ast_id) = self.pairs[idx - 1];