Using a Walker on Menu

Hello,

I am trying to extend the way wp_nav_menu works by creating a simple walker yet I am having difficulties with it.

Here is the class:

class Walker_Menu_Float extends Walker_Nav_Menu {
	function end_lvl(&$output, $depth) {
		$indent = str_repeat("\t", $depth);
		$output .= $indent . '<li class="float-divider">&nbsp;</li></ul>\n';
	}
}

As you may see I have added a very minor details yet when I use this in my theme I dont see this addition added to my code.

I tried modifying other functions, start_el, end_el and they work but this one doesnt.

Here is the code in the theme:

$walker = new Walker_Menu_Float();

wp_nav_menu(array(
	'menu' => 'Pests',
	'container' => null,
	'menu_id' => 'menu-pests',
	'theme_location' => 'menu-pests',
	'walker' => $walker
));

Any help is highly appreciated.

Thank you.

Alexander