code: public IfClassAvailable<Exclude<T>> getOrCreateIfClassAvailable()
     {
        List<Node> nodeList = childNode.get("if-class-available");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new IfClassAvailableImpl<Exclude<T>>(this, "if-class-available", childNode, nodeList.get(0));
        }
        return createIfClassAvailable();
     }
docs: If not already created, a new <code>if-class-available</code> element will be created and returned.
  Otherwise, the first existing <code>if-class-available</code> element will be returned.
  @return the instance defined for the element <code>if-class-available</code>