Graph::GetLink PHP Method

    protected function GetLink($key, $content, $row = 0)
    {
        $link = $this->GetLinkURL($key, $row);
        if (is_null($link)) {
            return $content;
        }
        $link_attr = array('xlink:href' => $link, 'target' => $this->link_target);
        return $this->Element('a', $link_attr, NULL, $content);
    }