protected function _getHeaderCommentHtml($element)
    {
        $html = $element->getComment()
            ? '<div class="comment">' . $element->getComment() . '</div>'
            : '';
        $url = Mage::helper('adminhtml')->getUrl('adminhtml/ExportAdyenSettings');
        $html .= <<<HTML
<div class="button-container">
    <button type="button" class="button" id="{$element->getHtmlId()}-export" onclick="location.href='{$url}'">
        {$this->__('Export Settings')}
    </button>
</div>
HTML;

        return $html;
    }