private void ensureStorageExists(LinqHandlerBuilder builder)
 {
     foreach (var documentType in builder.DocumentTypes())
     {
         _session.Database.EnsureStorageExists(documentType);
     }
 }
 private async ValueTask ensureStorageExistsAsync(LinqHandlerBuilder builder,
                                                  CancellationToken cancellationToken)
 {
     foreach (var documentType in builder.DocumentTypes())
     {
         await _session.Database.EnsureStorageExistsAsync(documentType, cancellationToken).ConfigureAwait(false);
     }
 }