code: public List<TldExtensionType<FunctionType<T>>> getAllFunctionExtension()
     {
        List<TldExtensionType<FunctionType<T>>> list = new ArrayList<TldExtensionType<FunctionType<T>>>();
        List<Node> nodeList = childNode.get("function-extension");
        for(Node node: nodeList)
        {
           TldExtensionType<FunctionType<T>>  type = new TldExtensionTypeImpl<FunctionType<T>>(this, "function-extension", childNode, node);
           list.add(type);
        }
        return list;
     }
docs: Returns all <code>function-extension</code> elements
  @return list of <code>function-extension</code>