@Nullable
  public Url getSelectedSVNURL() {
    TreePath selection = myRepositoryTree.getSelectionPath();
    if (selection == null) {
      return null;
    }
    Object element = selection.getLastPathComponent();
    if (element instanceof RepositoryTreeNode node) {
      return node.getURL();
    }
    return null;
  }
@Nullable
  public Url getSelectedSVNURL()