erenavsarogullari commented on a change in pull request #3112: [Java Streamlet 
API] Support abstractions on Streamlet Operators
URL: https://github.com/apache/incubator-heron/pull/3112#discussion_r234738872
 
 

 ##########
 File path: 
heron/api/src/java/org/apache/heron/streamlet/impl/operators/TransformOperator.java
 ##########
 @@ -41,10 +40,10 @@
  */
 public class TransformOperator<R, T> extends StreamletOperator<R, T>
     implements IStatefulComponent<Serializable, Serializable> {
+
   private static final long serialVersionUID = 429297144878185182L;
   private SerializableTransformer<? super R, ? extends T> 
serializableTransformer;
 
-  private OutputCollector collector;
 
 Review comment:
   @nwangtw yep, i agree and submitted new patch

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