public function addLtiLinkItem($url, $title=false, $text=false,
        $icon=false, $fa_icon=false, $custom=false,
        $points=false, $activityId=false, $additionalParams = array())
    {
            global $CFG;
        $params = array(
            'url' => $url,
            'title' => $title,
            'text' => $text,
            'icon' => $icon,
            'fa_icon' => $fa_icon,
            'custom' => $custom,
            'points' => $points,
            'activityId' => $activityId,
        );
        // package the parameter list into an array for the helper function
        if (! empty($additionalParams['placementTarget']))
            $params['placementTarget'] = $additionalParams['placementTarget'];
        if (! empty($additionalParams['placementWidth']))
            $params['placementWidth'] = $additionalParams['placementWidth'];
        if (! empty($additionalParams['placementHeight']))
            $params['placementHeight'] = $additionalParams['placementHeight'];

        $this->addLtiLinkItemExtended($params);
    }