code: @Deprecated
      public Redemptions getCouponRedemptionsByInvoice(final Integer invoiceNumber, final QueryParams params) {
          return getCouponRedemptionsByInvoice(invoiceNumber.toString(), params);
      }
docs: Lookup all coupon redemptions on an invoice given query params.
  
  @deprecated Prefer using Invoice#getId() as the id param (which is a String)
  
  @param invoiceNumber invoice number
  @param params {@link QueryParams}
  @return the coupon redemptions for this invoice on success, null otherwise