private List<LibraryConfigurable> getLibraryConfigurables() {
    List<LibraryConfigurable> libraryConfigurables = new ArrayList<>();
    for (int i = 0; i < myRoot.getChildCount(); i++) {
      final TreeNode node = myRoot.getChildAt(i);
      if (node instanceof MyNode) {
        final NamedConfigurable configurable = ((MyNode)node).getConfigurable();
        if (configurable instanceof LibraryConfigurable) {
          libraryConfigurables.add((LibraryConfigurable)configurable);
        }
      }
    }
    return libraryConfigurables;
  }
private List<LibraryConfigurable> getLibraryConfigurables()