{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"throw_invalid_attr!(attr,"}]}
            throw_invalid_attr!(attr, |diag| diag
        if let SubdiagnosticKind::MultipartSuggestion { .. } = subdiag.kind {
                .help("consider creating a `Subdiagnostic` instead"));