/**
  * Initialize widget
  */
 protected function initialize()
 {
     $name = $this->getShortcodeName();
     //find shortcode
     if (!($this->shortcode = ctShortcodeHandler::getInstance()->getShortcode($name))) {
         throw new InvalidArgumentException("Cannot find shortcode " . $name);
     }
     //maybe child?
     $this->childShortcode = $this->shortcode->getChildShortcode();
 }