{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"tcx.for_each_free_region(lhs,"}]}
                    tcx.for_each_free_region(lhs, |region| {
                    let mut lhs_regions = FxHashSet::default();
                        let region = universal_regions.to_region_vid(region);