public String getTargetDBInstanceIdentifier() {
        return this.targetDBInstanceIdentifier;
    }
<p>
The name of the DB instance to promote to the primary DB instance.
</p>
<p>
Specify the DB instance identifier for an Aurora Replica or a Multi-AZ readable standby in the DB cluster, for
example <code>mydbcluster-replica1</code>.
</p>
<p>
This setting isn't supported for RDS for MySQL Multi-AZ DB clusters.
</p>

@return The name of the DB instance to promote to the primary DB instance.</p>
        <p>
        Specify the DB instance identifier for an Aurora Replica or a Multi-AZ readable standby in the DB
        cluster, for example <code>mydbcluster-replica1</code>.
        </p>
        <p>
        This setting isn't supported for RDS for MySQL Multi-AZ DB clusters.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/FailoverDBClusterRequest.java