public DescribeDBEngineVersionsRequest withEngine(String engine) {
        setEngine(engine);
        return this;
    }
<p>
The database engine to return.
</p>

@param engine
       The database engine to return.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/DescribeDBEngineVersionsRequest.java