[ONOS-5058][ONOS-4796][ONOS-4893]compiler annotation implementation + defect fix

Change-Id: Ie317409d9ab1d36e626433558b2d51f26daaac82
diff --git a/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java b/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
index 6c2f3dc..23dacfe 100644
--- a/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
+++ b/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
@@ -1271,7 +1271,17 @@
     public static final String LIST = "List";
 
     /**
-     * Comment to be added for auto generated impl methods.
+     * Static attribute for queue.
+     */
+    public static final String QUEUE = "Queue";
+
+    /**
+     * Static attribute for set.
+     */
+    public static final String SET = "Set";
+
+    /**
+     * Comment to be added for autogenerated impl methods.
      */
     public static final String YANG_UTILS_TODO = "//TODO: YANG utils generated code";