list. So, the client should be able to always expect it.

                In this case, there would be two different schemas, one for input and
                another one for output.
                """
            ),
        ] = True,
        **extra: Annotated[
            Any,
            Doc(
                """

                This is much simpler (less smart) than `response_model_exclude_unset`
                and `response_model_exclude_defaults`. You probably want to use one of
                those two instead of this one, as those allow returning `None` values
                when it makes sense.

                Read more about it in the