public DescribeOrderableDBInstanceOptionsRequest withEngine(String engine) {
        setEngine(engine);
        return this;
    }
<p>
The name of the engine to retrieve instance options for.
</p>

@param engine
       The name of the engine to retrieve instance options for.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/DescribeOrderableDBInstanceOptionsRequest.java