Sort subscriptions on 'my subscriptions' page by ascending or descending order

sort_subscriptions.php

<?php
add_filter('wcs_get_users_subscriptions','sort_subscriptions', 10, 2);
function sort_subscriptions( $subscriptions, $user_id ){

  // choose either ksort or krsort  

  // in ascending order by ID
  //  ksort($subscriptions);

  // in descending order by ID
  krsort($subscriptions);

  return $subscriptions;
}