{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"let"}]}
                let outlives = ty::Binder::dummy(ty::OutlivesPredicate(sup_type, sub_region));
            for TypeOutlivesConstraint { sup_type, sub_region, origin } in my_region_obligations {
                let ty::OutlivesPredicate(sup_type, sub_region) =