private void updateSelectionFromTree() {
    TreePath[] treePaths = myTree.getSelectionPaths();
    if (treePaths != null) {
      List<NamedConfigurable> selectedConfigurables = new ArrayList<>();
      for (TreePath path : treePaths) {
        Object lastPathComponent = path.getLastPathComponent();
        if (lastPathComponent instanceof MyNode) {
          selectedConfigurables.add(((MyNode)lastPathComponent).getConfigurable());
        }
      }
      if (selectedConfigurables.size() > 1 && updateMultiSelection(selectedConfigurables)) {
        return;
      }
    }

    final TreePath path = myTree.getSelectionPath();
    if (path != null) {
      final Object lastPathComp = path.getLastPathComponent();
      if (!(lastPathComp instanceof MyNode node)) return;
      setSelectedNode(node);
    } else {
      setSelectedNode(null);
    }
  }
private void updateSelectionFromTree()