{"ast_node_type":"function","tokens":[{"end":88,"kind":"keyword","start":0,"text":"fn"}]}
            fn into_diag_arg(self, _: &mut Option<std::path::PathBuf>) -> DiagArgValue {
        impl IntoDiagArg for $ty {
                DiagArgValue::Str(Cow::Owned(format!("{self:?}")))