public void setRootElement(CompositePackagingElement<?> rootElement) {
   myContext
       .getOrCreateModifiableArtifactModel()
       .getOrCreateModifiableArtifact(myOriginalArtifact)
       .setRootElement(rootElement);
   myTreeStructure.updateRootElement();
   final DefaultMutableTreeNode node = myTree.getRootNode();
   node.setUserObject(myTreeStructure.getRootElement());
   myBuilder.updateNode(node);
   rebuildTree();
   myArtifactsEditor.getSourceItemsTree().rebuildTree();
 }
 public void updateRootNode() {
   myBuilder.updateNode(myTree.getRootNode());
 }