docs: public void showControllerModel(boolean flag)
      {
          boolean show = flag && isEnabled();
          mShowControllerModel = flag;
          if (mControllerModel != null)
          {
              mControllerModel.setEnable(show);
              mControllerGroup.setEnable(show);
          }
          else if (show)
          {
              createControllerModel();
          }
      }