public void setEngineVersion(String engineVersion) {
        this.engineVersion = engineVersion;
    }
<p>
The version number of the database engine to upgrade to. Currently, setting this parameter has no effect. To
upgrade your database engine to the most recent release, use the <a>ApplyPendingMaintenanceAction</a> API.
</p>

@param engineVersion
       The version number of the database engine to upgrade to. Currently, setting this parameter has no effect.
       To upgrade your database engine to the most recent release, use the <a>ApplyPendingMaintenanceAction</a>
       API.
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/ModifyDBInstanceRequest.java