QTreeWidgetItem::sortSubtree(); QTreeWidgetItem::sortChildren() does not sort the children of the item recursively.

QTreeWidgetItem::sortChildren() should sort the children of the item recursively.

Update:
We can't change the behavior of sortChildren() (there are existing Qt applications that rely on it's current behavior).
The task has been converted to a suggestion for a sortSubtree() function in QTreeWidgetItem.