Wordpress add class to category wp_list_categories

wp add class to wp_list_categories

// add class to wp_list_categories 
// if category has a children add cat-parent class
add_filter( 'category_css_class', 'add_class_to_category', 10, 4);

function add_class_to_category($css_classes, $category, $depth, $args) {
    $children = get_terms( $category->taxonomy, array(
        'parent'    => $category->term_id,
        'hide_empty' => false
        ) );
        // print_r($children); // uncomment to examine for debugging
        if($children) { // get_terms will return false if tax does not exist or term wasn't found.
            // term has children
            $css_classes[] = 'cat-parent';
        }
    
    return $css_classes;
}