protected function renderMarkup(FileUpload $element)
    {
        $markup = '
<div class="%s" id="%s-dropzone">
    %s
   __input__
</div>';
        
        return sprintf(
            $markup,
            $this->getDropZoneClass($element),
            $element->getAttribute('id'),
            $this->renderFileList($element)
        );
    }