/**
* Gets the optional version ID specifying which version of the object to download. If not
* specified, the most recent version will be downloaded.
*
* <p>Objects created before versioning was enabled or when versioning is suspended are given the
* default <code>null</code> version ID (see {@link Constants#NULL_VERSION_ID}). Note that the
* <code>null</code> version ID is a valid version ID and is not the same as not having a version
* ID.
*
* <p>For more information about enabling versioning for a bucket, see {@link
* AmazonS3#setBucketVersioningConfiguration(SetBucketVersioningConfigurationRequest)}.
*
* @return The optional version ID specifying which version of the object to download. If not
* specified, the most recent version will be downloaded.
* @see GetObjectRequest#setVersionId(String)
* @see GetObjectRequest#withVersionId(String)
*/
public String getVersionId() {
return s3ObjectIdBuilder.getVersionId();
}