public void setDBSubnetGroupName(String dBSubnetGroupName) {
        this.dBSubnetGroupName = dBSubnetGroupName;
    }
<p>
A DB subnet group to associate with this DB instance.
</p>
<p>
If there is no DB subnet group, then it is a non-VPC DB instance.
</p>

@param dBSubnetGroupName
       A DB subnet group to associate with this DB instance.</p>
       <p>
       If there is no DB subnet group, then it is a non-VPC DB instance.
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/CreateDBInstanceRequest.java