@Override
    public CancelExportTaskResult cancelExportTask(CancelExportTaskRequest request) {
        request = beforeClientExecution(request);
        return executeCancelExportTask(request);
    }
<p>
Cancels an export task in progress that is exporting a snapshot or cluster to Amazon S3. Any data that has
already been written to the S3 bucket isn't removed.
</p>

@param cancelExportTaskRequest
@return Result of the CancelExportTask operation returned by the service.
@throws ExportTaskNotFoundException
        The export task doesn't exist.
@throws InvalidExportTaskStateException
        You can't cancel an export task that has completed.
@sample AmazonRDS.CancelExportTask
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/CancelExportTask" target="_top">AWS API
     Documentation</a>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/AmazonRDSClient.java