$hold_info->{barcodes} = [ uniq map { defined $_->barcode && $_->item_group && ( $_->item_group->id == $res_info->item_group_id )  ? $_->barcode : () } @$items ];

        my @items = uniq map {

                 defined $_->barcode

              && $_->item_group

              && ( $_->item_group->id == $res_info->item_group_id )

              ? $_->barcode

              : ()

        } @$items;

        next unless @items;

        $hold_info->{barcodes} = \@items;