public CreateAutoPredictorRequest withReferencePredictorArn(String referencePredictorArn) {
        setReferencePredictorArn(referencePredictorArn);
        return this;
    }
<p>
The ARN of the predictor to retrain or upgrade. This parameter is only used when retraining or upgrading a
predictor. When creating a new predictor, do not specify a value for this parameter.
</p>
<p>
When upgrading or retraining a predictor, only specify values for the <code>ReferencePredictorArn</code> and
<code>PredictorName</code>. The value for <code>PredictorName</code> must be a unique predictor name.
</p>

@param referencePredictorArn
       The ARN of the predictor to retrain or upgrade. This parameter is only used when retraining or upgrading a
       predictor. When creating a new predictor, do not specify a value for this parameter.</p>
       <p>
       When upgrading or retraining a predictor, only specify values for the <code>ReferencePredictorArn</code>
       and <code>PredictorName</code>. The value for <code>PredictorName</code> must be a unique predictor name.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-forecast/src/main/java/com/amazonaws/services/forecast/model/CreateAutoPredictorRequest.java