{"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(adt_def) = ty.ty_adt_def()
    fn is_diag_message<'cx>(cx: &LateContext<'cx>, ty: MiddleTy<'cx>) -> bool {
            && let Some(name) = cx.tcx.get_diagnostic_name(adt_def.did())