public void setPeriodsBackward(Integer periodsBackward) {
        this.periodsBackward = periodsBackward;
    }
<p>
The periods backward setup of a forecast computation.
</p>

@param periodsBackward
       The periods backward setup of a forecast computation.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/ForecastComputation.java