code: public FacesConfigClientBehaviorRendererType<FacesConfigRenderKitType<T>> getOrCreateClientBehaviorRenderer()
     {
        List<Node> nodeList = childNode.get("client-behavior-renderer");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new FacesConfigClientBehaviorRendererTypeImpl<FacesConfigRenderKitType<T>>(this, "client-behavior-renderer", childNode, nodeList.get(0));
        }
        return createClientBehaviorRenderer();
     }
docs: If not already created, a new <code>client-behavior-renderer</code> element will be created and returned.
  Otherwise, the first existing <code>client-behavior-renderer</code> element will be returned.
  @return the instance defined for the element <code>client-behavior-renderer</code>