@Override
 public void addedSystem(
     int index, String name, BitSet allTypes, BitSet oneTypes, BitSet notTypes) {
   for (int i = 0, n = _listeners.size(); i < n; ++i) {
     EntityTrackerCommunicator communicator = _listeners.get(i);
     communicator.addedSystem(index, name, allTypes, oneTypes, notTypes);
   }
   _systems.add(Tuple3.create(index, name, new AspectInfo(allTypes, oneTypes, notTypes)));
   _entitySystemsEntitiesCount.set(index, 0);
   _entitySystemsMaxEntitiesCount.set(index, 0);
 }