public MasterUserOptions withMasterUserARN(String masterUserARN) {
        setMasterUserARN(masterUserARN);
        return this;
    }
<p>
ARN for the master user (if IAM is enabled).
</p>

@param masterUserARN
       ARN for the master user (if IAM is enabled).
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-elasticsearch/src/main/java/com/amazonaws/services/elasticsearch/model/MasterUserOptions.java