virtual int getLength(const eServiceReference &ref);
virtual SWIG_VOID(RESULT) getEvent(const eServiceReference &ref, ePtr<eServiceEvent> &SWIG_OUTPUT, time_t start_time=-1);
// returns true when not implemented
virtual int getLength(const eServiceReference &ref);
virtual SWIG_VOID(RESULT) getEvent(const eServiceReference &ref, ePtr<eServiceEvent> &SWIG_OUTPUT, time_t start_time=-1);
// returns true when not implemented