protected void sortChildren(Sorter @NotNull [] sorters) {
    if (myChildren == null) return;

    myChildren.sort(new CompositeComparator(sorters));

    for (CachingChildrenTreeNode child : myChildren) {
      if (child instanceof GroupWrapper) {
        child.sortChildren(sorters);
      }
    }
  }
protected void sortChildren(Sorter @NotNull [] sorters)