question: public void addExitTime ( double time ) { if ( exitTimes == null ) { return ; } if ( time < 0 ) { time = 0.0 ; } exitTimes . add ( Double . valueOf ( time ) ) ; }
target:  Register the time the packet leaves an entity such as a Router or CloudResource. This method should be called by routers and other entities when the InfoPacket is leaving them. It should also supply the current simulation time.