@Override
        protected void serialize(Encoder encoder, NullValueSnapshot value) {
        }

        @Override
        protected NullValueSnapshot deserialize(Decoder decoder) {
            return NullValueSnapshot.INSTANCE;
        }

        @Override
        public Class<NullValueSnapshot> getIsolatableClass() {

        int type = decoder.readSmallInt();
        int size;
        String className;
        switch (type) {
            case NULL_SNAPSHOT:
                return NullValueSnapshot.INSTANCE;
            case TRUE_SNAPSHOT:
                return BooleanValueSnapshot.TRUE;
            case FALSE_SNAPSHOT:
                return BooleanValueSnapshot.FALSE;
            case STRING_SNAPSHOT:

        snapshotter.snapshot(false) != snapshotter.snapshot(isolated)
    }

    def "creates snapshot for null value"() {
        expect:
        snapshotter.snapshot(null).is NullValueSnapshot.INSTANCE
    }

    def "creates snapshot for isolated null value"() {
        expect:
        def isolated = isolatableFactory.isolate(null)
        snapshotter.snapshot(null) == snapshotter.snapshot(isolated)