public PeriodSchema(PeriodSchema source) : base(source) { }
public PeriodSchema(PeriodSchema source, bool isShallowClone) : base(source, isShallowClone) { }
public PeriodSchema(PeriodSchema source) : base(source) { }
public PeriodSchema(PeriodSchema source, bool isShallowClone) : base(source, isShallowClone) { }