Is there a property of Telerik RadTreeView to collapse all children when a parent is collapsed?

I am using MVVM for a WPF ap开发者_开发技巧p and I have a Telerik RadTreeView, and when I collapse a parent, I'd like to recursively collapse all children (and their children, etc) so that when I expand the parent again, I don't see any grandchildren, because all children are collapsed. Is there a property of the RadTreeView that Can accomplish this, or any relatively easy alternative way? Thanks.

---

Stumbled across this question searching for some other RadTreeView related topics.

Based on the current Telerik RadTreeView Documentation:

When you need to expand or collapse all the items recursively for a given item use the ExpandAll() and CollapseAll() methods of the RadTreeViewItem respectively. When you need to expand/collapse all the nodes in the tree use ExpandAll() and CollapseAll() methods of the RadTreeView.