{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"dead_codes.sort_by_key(|v|"}]}
        dead_codes.sort_by_key(|v| v.level.0);
        // FIXME: `dead_codes` should probably be morally equivalent to `IndexMap<(Level, LintExpectationId), (DefId, Symbol)>`
        for group in dead_codes.chunk_by(|a, b| a.level == b.level) {