/**
* The Class AddL2GwDevicesToTransportZoneJob.
*/
-public class AddL2GwDevicesToTransportZoneJob implements Callable<List<ListenableFuture<Void>>> {
+public class AddL2GwDevicesToTransportZoneJob implements Callable<List<? extends ListenableFuture<?>>> {
private static final Logger LOG = LoggerFactory.getLogger(AddL2GwDevicesToTransportZoneJob.class);
private final ItmRpcService itmRpcService;