// Create predicate and selector.
Predicate predicate = new Predicate();
predicate.setField("Id");
predicate.setOperator(PredicateOperator.IN);
predicate.setValues(conversionIds.toArray(new String[0]));
Selector selector = new Selector();
selector.setFields(new String[] {"Id"});
selector.setPredicates(new Predicate[] {predicate});
// Get all conversion trackers.
Map<Long, AdWordsConversionTracker> conversionTrackers =
new HashMap<Long, AdWordsConversionTracker>();
ConversionTrackerPage page = conversionTrackerService.get(selector);