public function hasItemContent(core_kernel_classes_Resource $item, $lang = '')
    {
        if (is_null($item)) {
            return false;
        }

        if (empty($lang)) {
            $lang = $this->getSessionLg();
        }

        $itemContents = $item->getPropertyValuesByLg($this->itemContentProperty, $lang);
        return !$itemContents->isEmpty();
    }