{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":")"}]}
    ) -> Result<Option<(SubdiagnosticKind, Path, bool)>, DiagnosticDeriveError> {
        attr: &Attribute,
        let Some(subdiag) = SubdiagnosticVariant::from_attr(attr, self)? else {