code: public PaymillList<Subscription> list( Subscription.Filter filter, Subscription.Order order, Integer count, Integer offset ) {
      return RestfulUtils.list( SubscriptionService.PATH, filter, order, count, offset, Subscription.class, super.httpClient );
    }
docs: This function returns a {@link List} of PAYMILL {@link Subscription} objects.<br>
  <br>
  In which order this list is returned depends on the optional parameters. If <code>null</code> is given, no filter
  or order will be applied, overriding the default count and offset.
  
  @param filter {@link com.paymill.models.Subscription.Filter} or <code>null</code>
  @param order {@link com.paymill.models.Subscription.Order} or <code>null</code>
  @param count Max {@link Integer} of returned objects in the {@link PaymillList}
  @param offset {@link Integer} to start from.
  @return {@link PaymillList} which contains a {@link List} of PAYMILL {@link Subscription}s and their total count.