CLI command to help debug the mapping of next-Objectives to the
groups that are created by device drivers.

Change-Id: Iff9e04e5e96b2cabbdb40e83215315d2e27791a6
diff --git a/drivers/default/src/main/java/org/onosproject/driver/pipeline/SoftRouterPipeline.java b/drivers/default/src/main/java/org/onosproject/driver/pipeline/SoftRouterPipeline.java
index 55e8bbf..0379c0e 100644
--- a/drivers/default/src/main/java/org/onosproject/driver/pipeline/SoftRouterPipeline.java
+++ b/drivers/default/src/main/java/org/onosproject/driver/pipeline/SoftRouterPipeline.java
@@ -57,6 +57,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 import java.util.Objects;
 
 import static org.onlab.util.Tools.delay;
@@ -467,4 +468,10 @@
 
     }
 
+    @Override
+    public List<String> getNextMappings(NextGroup nextGroup) {
+        // nextObjectives converted to flow-actions not groups
+        return Collections.emptyList();
+    }
+
 }