ProductBiddingCategory otherBiddingCategory = new ProductBiddingCategory();
otherBiddingCategory.setType(ProductDimensionType.BIDDING_CATEGORY_L1);
helper.createUnit(otherBrand, otherBiddingCategory, 110000L);
// Make the mutate request.
AdGroupCriterionReturnValue result = adGroupCriterionService.mutate(helper.getOperations());
// For each criterion, make a list containing each of its children.
// We always create the parent before the child, so we can rely on that here.
Map<Long, List<ProductPartition>> children = Maps.newHashMap();
ProductPartition rootNode = null;