{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"if"}]}
            if let ty::RegionKind::ReEarlyParam(ebr) = r.kind() {
        fn visit_region(&mut self, r: ty::Region<'tcx>) {
                self.variances[ebr.index as usize] = ty::Invariant;