english.setId(1000L);
campaignEstimateRequest.setCriteria(new Criterion[] {unitedStates, english});
campaignEstimateRequests.add(campaignEstimateRequest);
// Create selector.
TrafficEstimatorSelector selector = new TrafficEstimatorSelector();
selector.setCampaignEstimateRequests(campaignEstimateRequests
.toArray(new CampaignEstimateRequest[] {}));
// Get traffic estimates.
TrafficEstimatorResult result = trafficEstimatorService.get(selector);