{"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
            let live_region_vid = self.universal_regions.to_region_vid(live_region);
        self.infcx.tcx.for_each_free_region(&ty, |live_region| {
            self.constraints.liveness_constraints.add_location(live_region_vid, location);