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