class StartPumping extends DriverEvent {
    public StartPumping(long eventTime,Driver d){
        super(eventTime,d);
    }

    public void perform(Scheduler scheduler){
        Driver d = getDriver();
        GasStation station = d.getStation();
        station.startPumping(d);
    }

    public String toString(){
        return getWhen()+" StartPumping";
    }
}