public void setUpgradeStatus(String upgradeStatus) {
        this.upgradeStatus = upgradeStatus;
    }
<p>
The current status of the upgrade. The status can take one of the following values:
</p>
<ul>
<li>
<p>
In Progress
</p>
</li>
<li>
<p>
Succeeded
</p>
</li>
<li>
<p>
Succeeded with Issues
</p>
</li>
<li>
<p>
Failed
</p>
</li>
</ul>

@param upgradeStatus
       The current status of the upgrade. The status can take one of the following values: </p>
       <ul>
       <li>
       <p>
       In Progress
       </p>
       </li>
       <li>
       <p>
       Succeeded
       </p>
       </li>
       <li>
       <p>
       Succeeded with Issues
       </p>
       </li>
       <li>
       <p>
       Failed
       </p>
       </li>
@see UpgradeStatus
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/model/UpgradeHistory.java