self.state: Annotated[
            State,
            Doc(
                """
                A state object for the application. This is the same object for the
                entire application, it doesn't change from request to request.

                You normally woudln't use this in FastAPI, for most of the cases you
                would instead use FastAPI dependencies.

                )
                raise validation_error
        if response is None:
            raise FastAPIError(
                "No response object was returned. There's a high chance that the "
                "application code is raising an exception and a dependency with yield "
                "has a block with a bare except, or a block with except Exception, "