docs: public void removeChildObjectFromCamera(final Widget child, int camera) {
          switch (camera) {
              case LEFT_CAMERA:
                  mLeftCameraRootWidget.removeChild(child);
                  break;
              case RIGHT_CAMERA:
                  mRightCameraRootWidget.removeChild(child);
                  break;
              default:
                  mMainCameraRootWidget.removeChild(child);
                  break;
          }
      }