{"ast_node_type":"impl","tokens":[{"end":89,"kind":"keyword","start":0,"text":"infringing_tys:"}]}
    infringing_tys: impl Iterator<Item = (Span, Ty<'tcx>, InfringingFieldsReason<'tcx>)>,
    tcx: TyCtxt<'tcx>,
    lang_item: LangItem,