code: public TagFileType<TldTaglibType<T>> getOrCreateTagFile()
     {
        List<Node> nodeList = childNode.get("tag-file");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new TagFileTypeImpl<TldTaglibType<T>>(this, "tag-file", childNode, nodeList.get(0));
        }
        return createTagFile();
     }
docs: If not already created, a new <code>tag-file</code> element will be created and returned.
  Otherwise, the first existing <code>tag-file</code> element will be returned.
  @return the instance defined for the element <code>tag-file</code>