@Nullable
    private static ChangesBrowserNode<?> getDefaultChangelistNode(@NotNull ChangesBrowserNode<?> root) {
      return root.iterateNodeChildren()
        .filter(ChangesBrowserChangeListNode.class)
        .find(node -> {
          ChangeList list = node.getUserObject();
          return list instanceof LocalChangeList && ((LocalChangeList)list).isDefault();
        });
    }
@Nullable
    private static ChangesBrowserNode<?> getDefaultChangelistNode(@NotNull ChangesBrowserNode<?> root)