public void setDBSubnetGroupName(String dBSubnetGroupName) {
        this.dBSubnetGroupName = dBSubnetGroupName;
    }
<p>
The new DB subnet group for the DB instance. You can use this parameter to move your DB instance to a different
VPC.
</p>
<p>
Changing the subnet group causes an outage during the change. The change is applied during the next maintenance
window, unless you specify <code>true</code> for the <code>ApplyImmediately</code> parameter.
</p>
<p>
Constraints: If supplied, must match the name of an existing DBSubnetGroup.
</p>
<p>
Example: <code>mySubnetGroup</code>
</p>

@param dBSubnetGroupName
       The new DB subnet group for the DB instance. You can use this parameter to move your DB instance to a
       different VPC.</p>
       <p>
       Changing the subnet group causes an outage during the change. The change is applied during the next
       maintenance window, unless you specify <code>true</code> for the <code>ApplyImmediately</code> parameter.
       </p>
       <p>
       Constraints: If supplied, must match the name of an existing DBSubnetGroup.
       </p>
       <p>
       Example: <code>mySubnetGroup</code>
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/ModifyDBInstanceRequest.java