@Override
  public boolean equals(Object object) {
    if (object == this) return true;
    if (object == null || !object.getClass().equals(getClass())) return false;
    // we should not change this behaviour if value is set to null
    return Comparing.equal(myValue, ((AbstractTreeNode<?>)object).myValue);
  }
@Override
  public boolean equals(Object object)