code: private BoundingBox transform(BoundingBox boundingBox, final Widget widget) {
          return transform(boundingBox, widget.getTransform()
                  .getLocalModelMatrix4f());
      }
docs: Apply the transform of {@code widget} to {@code boundingBox}.
  
  @param boundingBox
  The {@link BoundingBox} to apply the transform to.
  @param widget
  The {@link Widget} to get the transform from.
  @return The transformed {@code BoundingBox}.