@NotNull
  public TreeModelBuilder insertSubtreeRoot(@NotNull ChangesBrowserNode<?> node, @NotNull ChangesBrowserNode<?> subtreeRoot) {
    myModel.insertNodeInto(node, subtreeRoot, subtreeRoot.getChildCount());
    return this;
  }
@NotNull
  public TreeModelBuilder insertSubtreeRoot(@NotNull ChangesBrowserNode<?> node, @NotNull ChangesBrowserNode<?> subtreeRoot)