Hide qtreewidgetitem root

Hi all:)
Is it possible somehow to hide root qtreewidgetitem, but not it's children?
For instance:

Code:

---

root1
|
--root2
    |
     ---child1
     ---child2

---

I want to hide root2, but child1 and child2 must stay visible.;)

With QTreeWidget it is not possible without removing root2 item from the tree. You may use QTreeView and apply a proxy on the model to hide the item and move its children upwards in the hierarchy.