code: protected Model[] getCurrentModelsFromWorkers() {
          if (zoo == null)
              return new Model[0];
  
          val models = new Model[zoo.length];
          int cnt = 0;
          for (val w:zoo) {
              models[cnt++] = w.replicatedModel;
          }
  
          return models;
      }
docs: This method returns Models used in workers at this moment
  PLEASE NOTE: This method is NOT thread safe, and should NOT be used anywhere but tests
  
  @return