then:
        interaction {
            receivesChanges(change1, change2, change3)
        }
        0 * _

        when:
        cachingChanges.accept(new CollectingChangeVisitor())
        cachingChanges.accept(collectingVisitor)
        def reported = collectingVisitor.changes

        then:
        interaction {
            receivesChanges(change1, change2, change3)