public DBInstance withDBSubnetGroup(DBSubnetGroup dBSubnetGroup) {
        setDBSubnetGroup(dBSubnetGroup);
        return this;
    }
<p>
Information about the subnet group associated with the DB instance, including the name, description, and subnets
in the subnet group.
</p>

@param dBSubnetGroup
       Information about the subnet group associated with the DB instance, including the name, description, and
       subnets in the subnet group.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/DBInstance.java