{"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"let"}]}
        let language_items = tcx.lang_items();
    fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
        let Some(slice_len_fn_item_def_id) = language_items.slice_len_fn() else {