{"ast_node_type":"variable","tokens":[{"end":28,"kind":"keyword","start":0,"text":"let"}]}
    let padded = |x: &str| {
        loaded.iter().chain(&builtin).map(|&s| s.name.chars().count()).max().unwrap_or(0);
        let mut s = " ".repeat(max_name_len - x.chars().count());