Get Vapp Template used storage.

Hi,

Can someone give me an idea on how to get the used storage of a VappTemplate using the vCloud SDK?

I need this information without calling to enable the download.

I see that I can call "GetVappTemplateSize" but this returns the provisioned size instead of the used size (I am using thin provisioning). This would be very helpful since my code could sort by size and download the smaller ones first.

Thank you.