{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"ty::GenericArgs::for_item(tcx,"}]}
        ty::GenericArgs::for_item(tcx, def_id, |def, _| {
    ) -> GenericArgsRef<'tcx> {
            if let Some(arg) = original_args.get(def.index as usize) {