{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"for"}]}
        for (idx, &region) in regions.iter().enumerate() {
        write!(out, "{scc}[\"SCC({scc}) = {{", scc = scc.as_usize())?;
            render_region(tcx, region, regioncx, out)?;