RESULT addService(const eServiceReferenceDVB &service, eDVBService *service);
RESULT getService(const eServiceReferenceDVB &reference, ePtr<eDVBService> &service);
RESULT addService(const eServiceReferenceDVB &service, eDVBService *service);
RESULT getService(const eServiceReferenceDVB &reference, ePtr<eDVBService> &service);
RESULT startQuery(ePtr<iDVBChannelListQuery> &query, eDVBChannelQuery *query, const eServiceReference &source);
RESULT startQuery(ePtr<iDVBChannelListQuery> &query, eDVBChannelQuery *query, const eServiceReference &source);