LogicalDatastoreType.OPERATIONAL, dpnRoutersListIdentifier);
if (optionalDpnRoutersList.isPresent()) {
List<RoutersList> routersListFromDs = new ArrayList<RoutersList>(optionalDpnRoutersList.get()
- .getRoutersList().values());
+ .nonnullRoutersList().values());
routersListFromDs.forEach(router -> {
String routerName = router.getRouter();
Routers extRouters = NatUtil.getRoutersFromConfigDS(dataBroker, routerName);