static @NotNull JBIterable<TreePath> allPaths(JTree tree, boolean expand) {
    JBIterable<TreePath> paths;
    if (expand) {
      paths = TreeUtil.treePathTraverser(tree).traverse();
    }
    else {
      TreePath[] arr = new TreePath[tree.getRowCount()];
      for (int i = 0; i < arr.length; i++) {
        arr[i] = tree.getPathForRow(i);
      }
      paths = JBIterable.of(arr);
    }
    return paths.filter(o -> !(o.getLastPathComponent() instanceof LoadingNode));
  }
static @NotNull JBIterable<TreePath> allPaths(JTree tree, boolean expand)