Notification support for Consistent datastructures (ConsitentMap and DistributedSet)

Change-Id: If74cdc411c79c42c7643420e6369cf656849bb6a
diff --git a/core/api/src/main/java/org/onosproject/store/service/StorageService.java b/core/api/src/main/java/org/onosproject/store/service/StorageService.java
index b836ce8..55a07ed 100644
--- a/core/api/src/main/java/org/onosproject/store/service/StorageService.java
+++ b/core/api/src/main/java/org/onosproject/store/service/StorageService.java
@@ -53,7 +53,7 @@
      * @param <E> set element type
      * @return builder for an distributed set
      */
-    <E> SetBuilder<E> setBuilder();
+    <E> DistributedSetBuilder<E> setBuilder();
 
     /**
      * Creates a new AtomicCounterBuilder.