code: public Redemptions getCouponRedemptionsBySubscription(final String subscriptionUuid, final QueryParams params) {
          return doGET(Subscription.SUBSCRIPTION_RESOURCE + "/" + subscriptionUuid + Redemptions.REDEMPTIONS_RESOURCE,
                  Redemptions.class, params);
      }
docs: Lookup all coupon redemptions on a subscription given query params.
  
  @param subscriptionUuid String subscription uuid
  @param params {@link QueryParams}
  @return the coupon redemptions for this subscription on success, null otherwise