AdGroupAdSelector selector = new AdGroupAdSelector();
selector.setAdIds(new long[] {adId});
// Create date range.
DateRange range = new DateRange(TestUtils.firstDayOfMonth(), TestUtils.today());
selector.setStatsSelector(new AdStatsSelector(range, null));
// Get ads with the selector created above.
AdGroupAdPage page = service.get(selector);
assertNotNull(page);