+use SL::DB::Helper::ActsAsList;
+use SL::DB::Helper::LinkedRecords;
+use SL::DB::Helper::RecordItem;
+use SL::DB::Helper::CustomVariables (
+ sub_module => 'invoice',
+ cvars_alias => 1,
+ overloads => {
+ parts_id => {
+ class => 'SL::DB::Part',
+ module => 'IC',
+ },
+ },
+);
+
+__PACKAGE__->meta->make_manager_class;
+
+__PACKAGE__->configure_acts_as_list(group_by => [qw(trans_id)]);