class TimestampsAndPeriodicWatermarksOperator extends AbstractUdfStreamOperator<T, AssignerWithPeriodicWatermarks<T>> implements OneInputStreamOperator<T, T>, Triggerable {

	public TimestampsAndPeriodicWatermarksOperator(AssignerWithPeriodicWatermarks<T> assigner) {
		super(assigner);
		this.chainingStrategy = ChainingStrategy.ALWAYS;
	}

	public  TimestampsAndPeriodicWatermarksOperator(AssignerWithPeriodicWatermarks<T> assigner);

}