code: public CascadeType<ManyToOne<T>> getOrCreateCascade()
     {
        Node node = childNode.getOrCreate("cascade");
        CascadeType<ManyToOne<T>> cascade = new CascadeTypeImpl<ManyToOne<T>>(this, "cascade", childNode, node);
        return cascade;
     }
docs: If not already created, a new <code>cascade</code> element with the given value will be created.
  Otherwise, the existing <code>cascade</code> element will be returned.
  @return  a new or existing instance of <code>CascadeType<ManyToOne<T>></code>