+ void updateState(tmgr_trace_iterator_t event_type, double value, double date);
+ double getLatency(){THROW_UNIMPLEMENTED;}
+ double getBandwidth(){THROW_UNIMPLEMENTED;}
+ void updateBandwidth(double value, double date=surf_get_clock()){THROW_UNIMPLEMENTED;}
+ void updateLatency(double value, double date=surf_get_clock()){THROW_UNIMPLEMENTED;}