feedIDs = new HashSet<String>(feedIDs);
int feedSize = feedIDs.size();
Map<String, List<Map<String, String>>> returnedData = new HashMap<String, List<Map<String,String>>>();
for (DataProvider dataRetrieval : dataProviders) {
timer.startInterval();
Map<String, SortedMap<Long, Map<String, String>>> obtainedValues = dataRetrieval
.getData(feedIDs, startTime, endTime, timeUnit);
for (Entry<String, SortedMap<Long, Map<String, String>>> entry: obtainedValues.entrySet()) {