private final Engine engine;
@XmlAttribute(required = true)
@XmlIDREF
private final Tool tool;
public FeatureResult() {
<BUG>this(new Measurement(), new Engine(), new Tool());
</BUG>
}
<BUG>public FeatureResult(Measurement measurement, Engine engine, Tool tool) {

this.measurement = measurement;
</BUG>
this.engine = engine;

private final Engine engine;
@XmlAttribute(required = true)
@XmlIDREF
private final Tool tool;
public FeatureResult() {
this(Collections.emptyList(), new Engine(), new Tool());
}
public FeatureResult(List<Measurement> measurements, Engine engine, Tool tool) {
this.measurements = new LinkedList<>();
this.measurements.addAll(measurements);
this.engine = engine;
