.child(Network.class, new NetworkKey(new NetworkId(NetworkUtils.OVERLAY_NETWORK_ID)));
WriteTransaction wrtx = dataBroker.newWriteOnlyTransaction();
wrtx.merge(LogicalDatastoreType.CONFIGURATION, nwIID.build(), network);
.child(Network.class, new NetworkKey(new NetworkId(NetworkUtils.OVERLAY_NETWORK_ID)));
WriteTransaction wrtx = dataBroker.newWriteOnlyTransaction();
wrtx.merge(LogicalDatastoreType.CONFIGURATION, nwIID.build(), network);