public function insertGroup($group, $uri = null)
    {
        if ($uri === null) {
            $uri  = self::APPS_BASE_FEED_URI . self::APPS_GROUP_PATH . '/';
            $uri .= $this->getDomain();
        }
        $newEntry = $this->insertEntry($group, $uri, 'Zend_Gdata_Gapps_GroupEntry');
        return $newEntry;
    }