{"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"self.outlives.add(fr_a,"}]}
        self.outlives.add(fr_a, fr_b);
        debug!("relate_universal_regions: fr_a={:?} outlives fr_b={:?}", fr_a, fr_b);
        self.inverse_outlives.add(fr_b, fr_a);