when:
        def calledFor = []
        composite.all { calledFor << it }

        then:
        calledFor == ["a", "b"]

        when:
        composite.addCollection(component2)

        then:
        calledFor == ["a", "b", "c", "d"]
    }

    def "removed callback called when removed from composite"() {
        given:
        def component1 = collection("a", "b")

        CompositeDomainObjectSet<T> out = new CompositeDomainObjectSet<T>(delegate, callbackActionDecorator);
        for (DomainObjectCollection<? extends T> c : collections) {
            out.addCollection(c);
        }
        return out;
    }

    private CompositeDomainObjectSet(DefaultDomainObjectSet<T> delegate, CollectionCallbackActionDecorator callbackActionDecorator) {
        super(delegate);

        for (int i = 0; i < array.length; i++) {
          array[i] = counter.getAndIncrement();
        }
        builder.addAll(array);
      }
    },
    ADD_COLLECTION {
      @Override
      void doIt(ImmutableDoubleArray.Builder builder, AtomicInteger counter) {
        List<Double> list = new ArrayList<>();
        double num = RANDOM.nextInt(10);

        for (int i = 0; i < array.length; i++) {
          array[i] = counter.getAndIncrement();
        }
        builder.addAll(array);
      }
    },
    ADD_COLLECTION {
      @Override
      void doIt(ImmutableLongArray.Builder builder, AtomicLong counter) {
        List<Long> list = new ArrayList<>();
        long num = RANDOM.nextInt(10);
        for (int i = 0; i < num; i++) {

        int[] array = new int[RANDOM.nextInt(10)];
        for (int i = 0; i < array.length; i++) {
          array[i] = counter.getAndIncrement();
        }
        builder.addAll(array);
      }
    },
    ADD_COLLECTION {
      @Override
      void doIt(ImmutableIntArray.Builder builder, AtomicInteger counter) {
        List<Integer> list = new ArrayList<>();
        int num = RANDOM.nextInt(10);

        for (int i = 0; i < array.length; i++) {
          array[i] = counter.getAndIncrement();
        }
        builder.addAll(array);
      }
    },
    ADD_COLLECTION {
      @Override
      void doIt(ImmutableLongArray.Builder builder, AtomicLong counter) {
        List<Long> list = new ArrayList<>();
        long num = RANDOM.nextInt(10);
        for (int i = 0; i < num; i++) {

        for (int i = 0; i < array.length; i++) {
          array[i] = counter.getAndIncrement();
        }
        builder.addAll(array);
      }
    },
    ADD_COLLECTION {
      @Override
      void doIt(ImmutableDoubleArray.Builder builder, AtomicInteger counter) {
        List<Double> list = new ArrayList<>();
        double num = RANDOM.nextInt(10);