Hide qtreewidgetitem root

[altVis]

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

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

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

[wysota]

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.