code: public NamedNativeQuery<OrmDescriptor> getOrCreateNamedNativeQuery()
     {
        List<Node> nodeList = model.get("named-native-query");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new NamedNativeQueryImpl<OrmDescriptor>(this, "named-native-query", model, nodeList.get(0));
        }
        return createNamedNativeQuery();
     }
docs: If not already created, a new <code>named-native-query</code> element will be created and returned.
  Otherwise, the first existing <code>named-native-query</code> element will be returned.
  @return the instance defined for the element <code>named-native-query</code>