Widget added to stack depending on different scene states

stackchildren.dart

@override
  Widget build(BuildContext context) {
    List<Widget> stackChildren = [];

    switch (currentScreenState) {
      case CURRENT_SCREEN_STATE.INIT_STATE:
        stackChildren.addAll(_getBgWidgets());
        stackChildren.addAll(_getDefaultWidgets());
        stackChildren.addAll(_getInitScreenWidgets());
        stackChildren.add(_getBrandTitle());

        break;
      case CURRENT_SCREEN_STATE.REVEALING_ANIMATING_STATE:
        stackChildren.addAll(_getBgWidgets());
        stackChildren.addAll(_getDefaultWidgets());
        stackChildren.add(_getBrandTitle());
        break;
      case CURRENT_SCREEN_STATE.POST_REVEAL_STATE:
        stackChildren.addAll(_getBgWidgets());
        stackChildren.addAll(_getDefaultWidgets());
        stackChildren.insert(stackChildren.length - 1, _getCurvedPageSwitcher());
        stackChildren.addAll(_getPostRevealAnimationStateWidgets());
        stackChildren.add(buildPages());
        break;
    }

    return Stack(children: stackChildren);
  }