public virtual StripeSubscription Update(string customerId, string subscriptionId, StripeSubscriptionCreateOptions updateOptions)
        {
            var url = string.Format(Urls.Subscriptions + "/{1}", customerId, subscriptionId);

            url = ParameterBuilder.ApplyAllParameters(updateOptions, url);

            var response = Requestor.PostString(url, ApiKey);

            return(Mapper <StripeSubscription> .MapFromJson(response));
        }