code: public Alternatives<BeansDescriptor> getOrCreateAlternatives()
     {
        List<Node> nodeList = model.get("alternatives");
        if (nodeList != null && nodeList.size() > 0)
        {
           return new AlternativesImpl<BeansDescriptor>(this, "alternatives", model, nodeList.get(0));
        }
        return createAlternatives();
     }
docs: If not already created, a new <code>alternatives</code> element will be created and returned. Otherwise, the first
  existing <code>alternatives</code> element will be returned.
  
  @return the instance defined for the element <code>alternatives</code>