code: @SuppressWarnings("unchecked")
      protected void registerDefaultComponentAnnotations(final ContextInitializer initializer) {
          initializer.scanFor(ViewActionContainer.class, ViewDialog.class, View.class, StageViewport.class,
                  Property.class);
      }
docs: Invoked before context initiation.
  
  @param initializer should be used to register component annotations to scan for.