public async Task <Response <AlwaysInitializeTestModel> > Operation1Async(AlwaysInitializeTestModel model, CancellationToken cancellationToken = default)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            using var message = CreateOperation1Request(model);
            await _pipeline.SendAsync(message, cancellationToken).ConfigureAwait(false);

            switch (message.Response.Status)
            {
            case 200:
            {
                AlwaysInitializeTestModel value = default;
                using var document = await JsonDocument.ParseAsync(message.Response.ContentStream, default, cancellationToken).ConfigureAwait(false);

                if (document.RootElement.ValueKind == JsonValueKind.Null)
                {
                    value = null;
                }
                else
                {
                    value = AlwaysInitializeTestModel.DeserializeAlwaysInitializeTestModel(document.RootElement);
                }
                return(Response.FromValue(value, message.Response));
            }
        public void InitializesMembersWhenDeserializing()
        {
            var inputClass = AlwaysInitializeTestModel.DeserializeAlwaysInitializeTestModel(JsonDocument.Parse("{}").RootElement);

            Assert.IsInstanceOf <Item>(inputClass.AlwaysInitializeObject);
            Assert.IsInstanceOf <List <Item> >(inputClass.AlwaysInitializeList);
            Assert.IsInstanceOf <List <Item> >(inputClass.RequiredAlwaysInitializeList);
            Assert.Null(inputClass.RequiredList);
            Assert.Null(inputClass.DefaultList);
            Assert.Null(inputClass.DefaultObject);
        }