}

    static class TestStaticMetadataVisitor extends TestNodeMetadataVisitor<TypeToken<?>> implements TypeMetadataWalker.StaticMetadataVisitor {
        @Override
        protected String valueToString(TypeToken<?> value) {
            return value.toString()
        }
    }

    static class TestInstanceMetadataVisitor extends TestNodeMetadataVisitor<Object> implements TypeMetadataWalker.InstanceMetadataVisitor {