public String getKmsKeyArn() {
        return this.kmsKeyArn;
    }
<p>
The Amazon Resource Name (ARN) of the KMS key that is used to encrypt the connection parameters for the instance
profile.
</p>
<p>
If you don't specify a value for the <code>KmsKeyArn</code> parameter, then DMS uses your default encryption key.
</p>
<p>
KMS creates the default encryption key for your Amazon Web Services account. Your Amazon Web Services account has
a different default encryption key for each Amazon Web Services Region.
</p>

@return The Amazon Resource Name (ARN) of the KMS key that is used to encrypt the connection parameters for the
        instance profile.</p>
        <p>
        If you don't specify a value for the <code>KmsKeyArn</code> parameter, then DMS uses your default
        encryption key.
        </p>
        <p>
        KMS creates the default encryption key for your Amazon Web Services account. Your Amazon Web Services
        account has a different default encryption key for each Amazon Web Services Region.
aws-java-sdk-dms/src/main/java/com/amazonaws/services/databasemigrationservice/model/ModifyInstanceProfileRequest.java