{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"assert!(self.place_info.len()"}]}
        assert!(self.place_info.len() == column_count);
        assert!(self.rows.iter().all(|row| row.len() == column_count));
        let column_widths: Vec<usize> = (0..column_count)