{"ast_node_type":"variable","tokens":[{"end":34,"kind":"keyword","start":0,"text":"let"}]}
                let region_vid = {
                let r = ty::Region::new_late_param(self.infcx.tcx, self.mir_def.to_def_id(), kind);
                    let name = r.get_name_or_anon(self.infcx.tcx);