{"ast_node_type":"function","tokens":[{"end":99,"kind":"keyword","start":0,"text":"pub(crate)"}]}
    pub(crate) fn find_sub_region_live_at(&self, fr1: RegionVid, location: Location) -> RegionVid {
    #[instrument(skip(self), level = "trace", ret)]
        trace!(scc = ?self.constraint_sccs.scc(fr1));