public String getEngineType() {
        return this.engineType;
    }
<p>
Optional parameter to filter the output by domain engine type. Acceptable values are 'Elasticsearch' and
'OpenSearch'.
</p>

@return Optional parameter to filter the output by domain engine type. Acceptable values are 'Elasticsearch' and
        'OpenSearch'.
@see EngineType
aws-java-sdk-elasticsearch/src/main/java/com/amazonaws/services/elasticsearch/model/ListDomainNamesRequest.java