code: public PortComponentRefType<ServiceRefType<T>> getOrCreatePortComponentRef()
     {
        List<Node> nodeList = childNode.get("port-component-ref");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new PortComponentRefTypeImpl<ServiceRefType<T>>(this, "port-component-ref", childNode, nodeList.get(0));
        }
        return createPortComponentRef();
     }
docs: If not already created, a new <code>port-component-ref</code> element will be created and returned.
  Otherwise, the first existing <code>port-component-ref</code> element will be returned.
  @return the instance defined for the element <code>port-component-ref</code>