public void setCallbackToken(String callbackToken) {
        this.callbackToken = callbackToken;
    }
<p>
The pipeline generated token from the Amazon SQS queue.
</p>

@param callbackToken
       The pipeline generated token from the Amazon SQS queue.
aws-java-sdk-sagemaker/src/main/java/com/amazonaws/services/sagemaker/model/SendPipelineExecutionStepSuccessRequest.java