Populate TransferUtilityDownloadDirectoryResponse with total objects downloaded

stack-info: PR: #4109, branch: GarrettBeatty/stacked/14

Author: GarrettBeatty

generator/.DevConfigs/c49077d9-90b3-437f-b316-6d8d8833ae73.json

@@ -0,0 +1,11 @@
+{
+  "services": [
+    {
+      "serviceName": "S3",
+      "type": "patch",
+      "changeLogMessages": [
+        "Populate TransferUtilityDownloadDirectoryResponse with total objects downloaded"
+      ]
+    }
+  ]
+}

sdk/src/Services/S3/Custom/Transfer/Internal/_bcl+netstandard/DownloadDirectoryCommand.cs

@@ -113,7 +113,10 @@ await asyncThrottler.WaitAsync(cancellationToken)
                 await WhenAllOrFirstExceptionAsync(pendingTasks, cancellationToken)
                     .ConfigureAwait(continueOnCapturedContext: false);
 
-                return new TransferUtilityDownloadDirectoryResponse();
+                return new TransferUtilityDownloadDirectoryResponse
+                {
+                    ObjectsDownloaded = this._totalNumberOfFilesToDownload
+                };
             }
             finally
             {

sdk/src/Services/S3/Custom/Transfer/TransferUtilityDownloadDirectoryResponse.cs

@@ -22,5 +22,9 @@ namespace Amazon.S3.Transfer
     /// </summary>
     public class TransferUtilityDownloadDirectoryResponse
     {
+        /// <summary>
+        /// The number of objects that have been downloaded
+        /// </summary>
+        public long ObjectsDownloaded { get; set; }
     }
 }