@NotNull
  public static VcsTreeModelData includedUnderTag(@NotNull ChangesTree tree, @NotNull Object tag) {
    assert tree.getModel().getRoot() instanceof ChangesBrowserNode;

    ChangesBrowserNode<?> tagNode = findTagNode(tree, tag);
    if (tagNode == null) return new EmptyData();

    Set<Object> includedSet = tree.getIncludedSet();
    return new IncludedUnderData(includedSet, tagNode);
  }
@NotNull
  public static VcsTreeModelData includedUnderTag(@NotNull ChangesTree tree, @NotNull Object tag)