How is CLLocation handled?

Hi,
with the description in Seam (original project) there is support for transforming the CLLocation attribute to Transformable. Unfortunately in Seam3 I did not found any info about this. Is it supported?

When I use the same set up with as with Seam (this means the attribute is "Transformable" and has "CLLocationTransformer" value transformer name) it does not sync the values to cloud.

Thanks