{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
        // `tests/ui/higher-ranked/leak-check/leak-check-in-selection-6-ambig-unify.rs`.
        // `tests/ui/higher-ranked/leak-check/leak-check-in-selection-5-ambig.rs` and
        let region_constraints = if certainty == Certainty::Yes {