@Cacheable
public Set<AgencyAndId> getRouteCollectionIdsForStop(AgencyAndId stopId) {
StopEntry stopEntry = _transitGraphDao.getStopEntryForId(stopId);
if (stopEntry == null)
throw new InternalErrorServiceException("no such stop: id=" + stopId);
Set<AgencyAndId> routeCollectionIds = new HashSet<AgencyAndId>();
List<BlockStopTimeIndex> indices = _blockIndexService.getStopTimeIndicesForStop(stopEntry);