public void setKMSArn(String kMSArn) {
        this.kMSArn = kMSArn;
    }
<p>
Customer KMS ARN for encryption at rest. If not provided, system will use an Entity Resolution managed KMS key.
</p>

@param kMSArn
       Customer KMS ARN for encryption at rest. If not provided, system will use an Entity Resolution managed KMS
       key.
aws-java-sdk-entityresolution/src/main/java/com/amazonaws/services/entityresolution/model/IdMappingWorkflowOutputSource.java