private static List<DataTreeListenerInfo> getListenerActorsInfo(final Collection<ActorSelection> actors) {
final Timeout timeout = new Timeout(20, TimeUnit.SECONDS);
final List<Future<Object>> futureList = new ArrayList<>(actors.size());
private static List<DataTreeListenerInfo> getListenerActorsInfo(final Collection<ActorSelection> actors) {
final Timeout timeout = new Timeout(20, TimeUnit.SECONDS);
final List<Future<Object>> futureList = new ArrayList<>(actors.size());