public Boolean isReturn() {
        return this.returnValue;
    }
<p>
If the request succeeds, the response returns <code>true</code>. If the request fails, no response is returned,
and instead an error message is returned.
</p>

@return If the request succeeds, the response returns <code>true</code>. If the request fails, no response is
        returned, and instead an error message is returned.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/ModifySpotFleetRequestResult.java