private void ConfigureClient(LanguageClientOptions options) =>
 options.OnPublishDiagnostics(
     async(request, ct) => {
     try
     {
         TestOptions.ClientLoggerFactory.CreateLogger("test").LogCritical("start");
         await Task.Delay(500, ct);
         _diagnostics.AddOrUpdate(request.Uri, a => request.Diagnostics, (a, b) => request.Diagnostics);
     }
     catch (Exception e)
     {
         TestOptions.ClientLoggerFactory.CreateLogger("test").LogCritical(e, "error");
     }
 }
     );