Recovering a folder item ID

I am not being able to recover the ID of the parent directory of a node. I am using:

subjectHierarchyNode = slicer.vtkMRMLSubjectHierarchyNode.GetSubjectHierarchyNode(slicer.mrmlScene)
dirID = subjectHierarchyNode.CreateFolderItem(subjectHierarchyNode.GetSceneItemID(), 'test folder')  # this returns the value 10

Then I move a volume to the test folder, using the Data module, and execute:

childID = subjectHierarchyNode.GetItemByDataNode(slicer.util.getNode('test node'))

But the result is 3 instead of ID 10 of the directory. What am I doing wrong? Thank you!

This returns parent’s parent id. If you need parent id then call subjectHierarchyNode.GetItemParent(childID).

My bad, silly mistake.