code: public DynamicView createDynamicView(String key, String description) {
          assertThatTheViewKeyIsSpecifiedAndUnique(key);
  
          DynamicView view = new DynamicView(model, key, description);
          view.setViewSet(this);
          dynamicViews.add(view);
          return view;
      }
docs: Creates a dynamic view.
  
  @param key           the key for the view (must be unique)
  @param description   a description of the view
  @return              a DynamicView object
  @throws              IllegalArgumentException if the key is not unique