code: public FacesConfigManagedPropertyType<FacesConfigManagedBeanType<T>> getOrCreateManagedProperty()
     {
        List<Node> nodeList = childNode.get("managed-property");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new FacesConfigManagedPropertyTypeImpl<FacesConfigManagedBeanType<T>>(this, "managed-property", childNode, nodeList.get(0));
        }
        return createManagedProperty();
     }
docs: If not already created, a new <code>managed-property</code> element will be created and returned.
  Otherwise, the first existing <code>managed-property</code> element will be returned.
  @return the instance defined for the element <code>managed-property</code>