code: protected String getHeader( ITransaction transaction,
                                  String path,
                                  HttpServletResponse resp,
                                  HttpServletRequest req ) {
          return "<h1>Content of folder " + path + "</h1>";
      }
docs: Return the header to be displayed in front of the folder content
  
  @param transaction
  @param path
  @param resp
  @param req
  @return the header string