{"ast_node_type":"variable","tokens":[{"end":92,"kind":"keyword","start":0,"text":"let"}]}
    let sub = get_type_suggestion(cx.typeck_results().node_type(hir_id), val, negative).map(
        if negative { OverflowingBinHexSign::Negative } else { OverflowingBinHexSign::Positive };
        |suggestion_ty| {