public void setObserver(ITrainPeriodSetObserver ob) { this.ob = ob; }
public void setObserver(ITrainPeriodSetObserver ob) { this.ob = ob; }
public void setObserver(ITrainPeriodSetObserver ob) { this.ob = ob; }
public void setObserver(ITrainPeriodSetObserver ob) { this.ob = ob; }