public String getVersionId() {
        return this.versionId;
    }
<p>
Each time the destination is updated for a delivery stream, the version ID is changed, and the current version ID
is required when updating the destination. This is so that the service knows it is applying the changes to the
correct version of the delivery stream.
</p>

@return Each time the destination is updated for a delivery stream, the version ID is changed, and the current
        version ID is required when updating the destination. This is so that the service knows it is applying
        the changes to the correct version of the delivery stream.
aws-java-sdk-kinesis/src/main/java/com/amazonaws/services/kinesisfirehose/model/DeliveryStreamDescription.java