Sticky headers in ListView

Hi, I've made a ListView with headers by implementing group descriptors as mentioned here.

This is working great, but as an extra addition I would like the group headers to be sticky to the top of the ListView like in this video:

https://www.youtube.com/watch?v=zluBwbf3aew

Is there an easy way to do this with RadListView?

Thanks in advance,

Bernd