{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"self.infcx.tcx.def_descr(self.regioncx.universal_regions().defining_ty.def_id());"}]}
            self.infcx.tcx.def_descr(self.regioncx.universal_regions().defining_ty.def_id());
        let escapes_from =