use strict;
 
 use SL::DB::MetaSetup::DeliveryOrderItem;
+use SL::DB::Helper::ActsAsList;
+use SL::DB::Helper::LinkedRecords;
+use SL::DB::Helper::RecordItem;
 use SL::DB::Helper::CustomVariables (
   sub_module  => 'delivery_order_items',
   cvars_alias => 1,
 
 __PACKAGE__->meta->initialize;
 
+__PACKAGE__->configure_acts_as_list(group_by => [qw(delivery_order_id)]);
+
 # methods
 
+sub record { goto &delivery_order }
+
 1;