/**
     * Associates this property with the task that produces its value.
     */
    void attachProducer(ModelObject owner);

    /**
     * A simple getter that checks if this property has been finalized.
     *
     * @return {@code true} if this property has been finalized, {@code false} otherwise
     */

        _ * owner.taskThatOwnsThisObject >> task
        def property = TestUtil.objectFactory().property(String)
        property.attachOwner(owner, Describables.of("<prop>"))
        property.attachProducer(owner)
        property.set("12")
        return property
    }

    Property<String> propertyWithCompletedProducer() {
        def task = Mock(Task)
        def state = Mock(TaskState)

    }

    def "shallow copy does not inherit producer from the original"() {
        given:
        def task = Mock(Task)
        def property = propertyWithNoValue()
        property.attachProducer(owner(task))

        expect:
        assertHasNoProducer(property.shallowCopy())
    }

    def "shallow copy reflects changes to the value"() {
        given: