write(encoder, valueSnapshot);
                }
            }
        } else if (snapshot instanceof ImmutableManagedValueSnapshot) {
            encoder.writeSmallInt(IMMUTABLE_MANAGED_SNAPSHOT);
            ImmutableManagedValueSnapshot valueSnapshot = (ImmutableManagedValueSnapshot) snapshot;
            encoder.writeString(valueSnapshot.getClassName());
            encoder.writeNullableString(valueSnapshot.getValue());

        write(original)

        expect:
        original == written
    }

    def "serializes immutable managed type properties"() {
        def original = new ImmutableManagedValueSnapshot("type", "name")
        write(original)

        expect:
        original == written
    }

    def "serializes class implementation properties"() {

            return new AttributeDefinitionSnapshot(value, classLoaderHasher);
        }

        @Override
        public ValueSnapshot managedImmutableValue(Managed managed) {
            return new ImmutableManagedValueSnapshot(managed.publicType().getName(), (String) managed.unpackState());
        }

        @Override
        public ValueSnapshot managedValue(Managed value, ValueSnapshot state) {