{"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
        let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
    ) -> Vec<(&'static str, Vec<LintId>)> {
        lints.sort_by_key(|l| l.0);