public void setEncryptionKeyArn(String encryptionKeyArn) {
        this.encryptionKeyArn = encryptionKeyArn;
    }
<p>
The unique ARN associated with the server-side encryption key. You can specify a key to encrypt your backups from
services that support full Backup management. If you do not specify a key, Backup creates an KMS key for you by
default.
</p>

@param encryptionKeyArn
       The unique ARN associated with the server-side encryption key. You can specify a key to encrypt your
       backups from services that support full Backup management. If you do not specify a key, Backup creates an
       KMS key for you by default.
aws-java-sdk-securityhub/src/main/java/com/amazonaws/services/securityhub/model/AwsBackupBackupVaultDetails.java