protected function widgetSelector(\Psc\HTML\Tag $tag = NULL, $subSelector = NULL) {
    $jQuery = \Psc\JS\jQuery::getClassSelector($tag ?: $this->html);
    
    if (isset($subSelector)) {
      $jQuery .= sprintf(".find(%s)", \Psc\JS\Helper::convertString($subSelector));
    }
    
    return $this->jsExpr($jQuery);
  }