public ReservedElasticsearchInstanceOffering withElasticsearchInstanceType(ESPartitionInstanceType elasticsearchInstanceType) {
        this.elasticsearchInstanceType = elasticsearchInstanceType.toString();
        return this;
    }
<p>
The Elasticsearch instance type offered by the reserved instance offering.
</p>

@param elasticsearchInstanceType
       The Elasticsearch instance type offered by the reserved instance offering.
@return Returns a reference to this object so that method calls can be chained together.
@see ESPartitionInstanceType
aws-java-sdk-elasticsearch/src/main/java/com/amazonaws/services/elasticsearch/model/ReservedElasticsearchInstanceOffering.java