ModelRegistry modelRegistry = ((ProjectInternal) project).getServices().get(ModelRegistry.class);
                modelRegistry.register(
                    registrationBuilder
                        .withProjection(ModelMapModelProjection.unmanaged(TASK_MODEL_TYPE, ChildNodeInitializerStrategyAccessors.of(NodeBackedModelMap.createUsingParentNode(new Transformer<NamedEntityInstantiator<Task>, MutableModelNode>() {

        // the type of the property node instead.
        ModelProjection projection = new EmptyReferenceProjection<T>(type);
        ModelRegistration registration = ModelRegistrations.of(getPath().child(name))
            .withProjection(projection)
            .descriptor(descriptor).build();
        ModelReferenceNode referenceNode = new ModelReferenceNode(modelRegistry, registration, this);
        if (target != null) {

        this.ruleExtractor = ruleExtractor;
        this.projectPath = projectPath;
        this.projectState = projectState;
        ModelRegistration rootRegistration = ModelRegistrations.of(ModelPath.ROOT).descriptor("<root>").withProjection(EmptyModelProjection.INSTANCE).build();
        modelGraph = new ModelGraph(new ModelElementNode(this, rootRegistration, null));
        ruleBindings = new RuleBindings();
        transition(modelGraph.getRoot(), Created, false);