Download List Filter

Hi,

I am trying to write a custom filter but I think due to my inexperience, it isn’t working =(. After reading your documentation on actions and filters (https://www.download-monitor.com/kb/action-and-filter-reference/), I am a bit unsure of what to do. Any assistance you or anyone could provide would be greatly appreciated.

function dlm_downloads_list_bootstrap_start( $args ) {

	$args = '<div class="container-fluid">';
	return $args;

}
add_filter('dlm_widget_downloads_list_start', 'dlm_downloads_list_bootstrap_start');

function dlm_downloads_list_bootstrap_end( $args ) {

	$args = '</div>';
	return $args;

}
add_filter( 'dlm_widget_downloads_list_end', 'dlm_downloads_list_bootstrap_end' );

https://wordpress.org/plugins/download-monitor/