private String orderDetailsAsString(OrderWS order) {
   order = api.getOrder(order.getId());
   return S(
       "order[{}]:type: {}, period: {}, activeSince: {}, nextBillableDay: {}",
       order.getId(),
       order.getBillingTypeStr(),
       order.getPeriodStr(),
       order.getActiveSince(),
       order.getNextBillableDay());
 }