Sets the subscription purge options at the domain level.
void setSubscriptionPurgeOption(SubscriptionPurgeOptionVO option) throws SUPAdminException;
If successful, sets the current subscription purge settings. If unsuccessful, returns SUPAdminException.
SubscriptionPurgeOptionVO option = new SubscriptionPurgeOptionVO(); option.setDaysInactive(15); supDomain.setSubscriptionPurgeOption(option);