async IAsyncEnumerable<ListInstancesResponse> IPaginator<ListInstancesResponse>.PaginateAsync(CancellationToken cancellationToken = default)
 {
     if (Interlocked.Exchange(ref _isPaginatorInUse, 1) != 0)
     {
         throw new System.InvalidOperationException("Paginator has already been consumed and cannot be reused. Please create a new instance.");
     }
     PaginatorUtils.SetUserAgentAdditionOnRequest(_request);
     var marker = _request.Marker;
     ListInstancesResponse response;
     do
     {
         _request.Marker = marker;
         response = await _client.ListInstancesAsync(_request, cancellationToken).ConfigureAwait(false);
         marker = response.Marker;
         cancellationToken.ThrowIfCancellationRequested();
         yield return response;
     }
     while (!string.IsNullOrEmpty(marker));
 }
 private Amazon.ElasticMapReduce.Model.ListInstancesResponse CallAWSServiceOperation(IAmazonElasticMapReduce client, Amazon.ElasticMapReduce.Model.ListInstancesRequest request)
 {
     Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "Amazon Elastic MapReduce", "ListInstances");
     try
     {
         #if DESKTOP
         return(client.ListInstances(request));
         #elif CORECLR
         return(client.ListInstancesAsync(request).GetAwaiter().GetResult());
         #else
                 #error "Unknown build edition"
         #endif
     }
     catch (AmazonServiceException exc)
     {
         var webException = exc.InnerException as System.Net.WebException;
         if (webException != null)
         {
             throw new Exception(Utils.Common.FormatNameResolutionFailureMessage(client.Config, webException.Message), webException);
         }
         throw;
     }
 }