class ImmutableThing implements Thing {

    @Override
    public Thing setFeature(final Feature feature) {
        final Features newFeatures;
        if (null == features || features.isNull()) {
            newFeatures = ThingsModelFactory.newFeaturesBuilder()
                    .set(feature)
                    .build();
        } else {
            newFeatures = features.setFeature(feature);
        }

        return setFeatures(newFeatures);
    }

    private  ImmutableThing(@Nullable final ThingId thingId,
            @Nullable final AccessControlList acl,
            @Nullable final PolicyId policyId,
            @Nullable final ThingDefinition definition,
            @Nullable final Attributes attributes,
            @Nullable final Features features,
            @Nullable final ThingLifecycle lifecycle,
            @Nullable final ThingRevision revision,
            @Nullable final Instant modified,
            @Nullable final Instant created,
            @Nullable final Metadata metadata);

}