PR feedback.

Author: codemzs

src/Microsoft.ML.DnnImageFeaturizer.AlexNet/AlexNetExtension.cs

@@ -6,8 +6,10 @@
 using System.IO;
 using Microsoft.ML.Data;
 using Microsoft.ML.Runtime;
+using Microsoft.ML.Transforms;
+using Microsoft.ML.Transforms.Onnx;
 
-namespace Microsoft.ML.Transforms.Onnx
+namespace Microsoft.ML
 {
     /// <summary>
     /// This is an extension method to be used with the <see cref="DnnImageFeaturizerEstimator"/> in order to use a pretrained AlexNet model.

src/Microsoft.ML.DnnImageFeaturizer.ResNet101/ResNet101Extension.cs

@@ -6,8 +6,10 @@
 using System.IO;
 using Microsoft.ML.Data;
 using Microsoft.ML.Runtime;
+using Microsoft.ML.Transforms;
+using Microsoft.ML.Transforms.Onnx;
 
-namespace Microsoft.ML.Transforms.Onnx
+namespace Microsoft.ML
 {
     /// <summary>
     /// This is an extension method to be used with the <see cref="DnnImageFeaturizerEstimator"/> in order to use a pretrained ResNet101 model.

src/Microsoft.ML.DnnImageFeaturizer.ResNet18/ResNet18Extension.cs

@@ -6,8 +6,10 @@
 using System.IO;
 using Microsoft.ML.Data;
 using Microsoft.ML.Runtime;
+using Microsoft.ML.Transforms;
+using Microsoft.ML.Transforms.Onnx;
 
-namespace Microsoft.ML.Transforms.Onnx
+namespace Microsoft.ML
 {
     /// <summary>
     /// This is an extension method to be used with the <see cref="DnnImageFeaturizerEstimator"/> in order to use a pretrained ResNet18 model.

src/Microsoft.ML.DnnImageFeaturizer.ResNet50/ResNet50Extension.cs

@@ -6,8 +6,10 @@
 using System.IO;
 using Microsoft.ML.Data;
 using Microsoft.ML.Runtime;
+using Microsoft.ML.Transforms;
+using Microsoft.ML.Transforms.Onnx;
 
-namespace Microsoft.ML.Transforms.Onnx
+namespace Microsoft.ML
 {
     /// <summary>
     /// This is an extension method to be used with the <see cref="DnnImageFeaturizerEstimator"/> in order to use a pretrained ResNet50 model.