{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
        let Self { pass: what, time, start_rss, end_rss } = self;
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, r#"{{"pass":"{what}","time":{time},"rss_start":"#).unwrap();