operations.add(operation);
}
// Display campaign labels.
for (CampaignLabel campaignLabelResult : campaignService.mutateLabel(
operations.toArray(new CampaignLabelOperation[operations.size()])).getValue()) {
System.out.printf("Campaign label for campaign ID %d and label ID %d was added.%n",
campaignLabelResult.getCampaignId(), campaignLabelResult.getLabelId());
}
}