Woocommerce one product per row

Hi,
I need to change shop page of Woocommerce from grid to list. I started from changing the number of products to one per row using the following function:
====
// Change number or products per row to 1
add_filter(‘loop_shop_columns’, ‘loop_columns’);
if (!function_exists(‘loop_columns’)) {
function loop_columns() {
return 1; // 1 products per row
}
}
====
I also tried this one:
===
// Override theme default specification for product # per row
function loop_columns() {
return 1; // 1 products per row
}
add_filter(‘loop_shop_columns’, ‘loop_columns’, 999);
=====
But it had no effect. Seems like theme design doesn’t use/support this filter.
My current theme is Llorix One Lite.
Please help to solve this problem.