private void showProblemInTree(ArtifactProblemDescription problem) {
    PackagingElementNode<?> node = myArtifactEditor.getLayoutTreeComponent().getRootNode();
    final List<PackagingElement<?>> pathToPlace = problem.getPathToPlace();
    if (node != null && pathToPlace != null) {
      List<PackagingElementNode<?>> nodes = node.getNodesByPath(pathToPlace.subList(1, pathToPlace.size()));
      for (PackagingElementNode<?> elementNode : nodes) {
        myProblemsForNodes.put(elementNode, problem);
      }
    }
  }
private void showProblemInTree(ArtifactProblemDescription problem)