ONOS-4971: Synthetic Link Data -- WIP

- Enhancing UiRegion to capture the hierarchical (parent/child) relationships captured in the UiTopoLayouts.

Change-Id: I152e0d52d4580b14b679f3387402077f16f61e6a
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/cli/ListRegions.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/cli/ListRegions.java
index cdb8bd5..70e0826 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/cli/ListRegions.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/cli/ListRegions.java
@@ -29,6 +29,7 @@
     @Override
     protected void execute() {
         UiSharedTopologyModel model = get(UiSharedTopologyModel.class);
+        print("%s", model.getNullRegion());
         sorted(model.getRegions()).forEach(r -> print("%s", r));
     }
 }