/**
  * Renders a disabe form elements toggle checkboxes element.
  */
 public function render(ElementInterface $element)
 {
     /* @var $element DisableElementsCapableFormSettings
      * @var $renderer   \Zend\View\Renderer\PhpRenderer
      * @var $headscript \Zend\View\Helper\HeadScript
      * @var $basepath   \Zend\View\Helper\BasePath */
     $renderer = $this->getView();
     $headscript = $renderer->plugin('headscript');
     $basepath = $renderer->plugin('basepath');
     $headscript->appendFile($basepath('Settings/js/forms.decfs.js'));
     return '<ul class="disable-elements-list" id="' . $element->getAttribute('id') . '-list"' . '>' . $this->renderCheckboxes($element->getCheckboxes()) . '</ul>';
 }