@Override
  protected void loadTree() {
    myTree.setRootVisible(false);
    myTree.setShowsRootHandles(false);
    for (Artifact artifact : myPackagingEditorContext.getArtifactModel().getAllArtifactsIncludingInvalid()) {
      addArtifactNode(artifact);
    }
  }
@Override
  protected void loadTree()