public Boolean isUpgradeProcessing() {
        return this.upgradeProcessing;
    }
<p>
The status of a domain version upgrade to a new version of OpenSearch or Elasticsearch. True if OpenSearch
Service is in the process of a version upgrade. False if the configuration is active.
</p>

@return The status of a domain version upgrade to a new version of OpenSearch or Elasticsearch. True if
        OpenSearch Service is in the process of a version upgrade. False if the configuration is active.
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/model/DomainStatus.java