Merge pull request #411 from watson-developer-cloud/hotfix-restore-categories-model

Restore categories model

Author: mediumTaj

src/IBM.Watson.NaturalLanguageUnderstanding.v1/Model/CategoriesOptions.cs

@@ -37,6 +37,16 @@ public class CategoriesOptions
         /// </summary>
         [JsonProperty("limit", NullValueHandling = NullValueHandling.Ignore)]
         public long? Limit { get; set; }
+        /// <summary>
+        /// Enter a [custom
+        /// model](https://cloud.ibm.com/docs/services/natural-language-understanding?topic=natural-language-understanding-customizing)
+        /// ID to override the standard categories model. The custom categories experimental feature will be retired on 19 December 
+        /// 2019. On that date, deployed custom categories models will no longer be accessible in Natural Language Understanding. 
+        /// The feature will be removed from Knowledge Studio on an earlier date. Custom categories models will no longer be accessible 
+        /// in Knowledge Studio on 17 December 2019.
+        /// </summary>
+        [JsonProperty("model", NullValueHandling = NullValueHandling.Ignore)]
+        public string Model { get; set; }
     }
 
 }