code: @SuppressWarnings("unchecked")
      public List<HtmlElement> findAllElementsWithAttribute(String attributeName) {
          return (List<HtmlElement>) htmlPage.getByXPath("//*[@" + attributeName + "]");
      }
docs: Returns all elements with the given attribute name as {@link HtmlElement} instances.
  
  @param attributeName name of the attribute to filter by
  @return all elements with the given attribute name as {@link HtmlElement} instances