public String getEncryptionKeyArn() {
        return this.encryptionKeyArn;
    }
<p>
The server-side encryption key that is used to protect your backups; for example,
<code>arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab</code>.
</p>

@return The server-side encryption key that is used to protect your backups; for example,
        <code>arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab</code>.
aws-java-sdk-backup/src/main/java/com/amazonaws/services/backup/model/DescribeBackupVaultResult.java