{"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"let"}]}
            let max = xs.iter().copied().max_by(|a, b| a.partial_cmp(b).unwrap()).unwrap();
        fn normalize(xs: &mut [f64]) {
            xs.iter_mut().for_each(|it| *it /= max);