Sort Brands

Hello all. 2 questions :
Is this code filter useful and compliant with the plugin to make the brands sortable:

add_filter( 'woocommerce_sortable_taxonomies','custom_sort_brands' );
function custom_sort_brands( $sortable ) {
	$sortable[] = 'product_brand';
	return $sortable;
}

and is the code to change the slug to what I need is useless? :

function customise_product_brand_slug ( $tax ) {
	$tax['rewrite']['slug'] = 'artists'; // Replace 'artists' with your desired brand slug.
	return $tax;
}
add_filter( 'register_taxonomy_product_brand', 'customise_product_brand_slug' );

Thanks