{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
        // `tests/ui/associated-type-bounds/return-type-notation/higher-ranked-bound-works.rs`.
        // And this is exercised in:
        let existing_bound_vars = self.rbv.late_bound_vars.get_mut(&hir_id.local_id).unwrap();