{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(polonius_liveness) = self.polonius_liveness {
        // When using `-Zpolonius=next`, we record the variance of each live region.
            polonius_liveness.record_live_region_variance(self.tcx, self.universal_regions, value);