ONOS-5411: Introduce basic region config.

Change-Id: I3f58e5758d0b350a9e8a03093a1475dbbacfc446
diff --git a/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopology.java b/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopology.java
index 3297608..f4ffb02 100644
--- a/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopology.java
+++ b/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopology.java
@@ -490,8 +490,12 @@
             log.debug("Synthetic link: {}", synthetic);
         });
 
+
         synthLinks.clear();
         synthLinks.addAll(slinks);
+
+        // TODO : compute and add host-device links to synthLinks...
+
     }
 
     private UiSynthLink inferSyntheticLink(UiDeviceLink link) {