code: public List<FormElement> forms() {
          ArrayList<FormElement> forms = new ArrayList<>();
          for (Element el: this)
              if (el instanceof FormElement)
                  forms.add((FormElement) el);
          return forms;
      }
docs: Get the {@link FormElement} forms from the selected elements, if any.
  @return a list of {@link FormElement}s pulled from the matched elements. The list will be empty if the elements contain
  no forms.