def __call__(
        self, environ: WSGIEnvironment, start_response: StartResponse
    ) -> t.Iterable[bytes]:
        """Process this response as WSGI application.

        :param environ: the WSGI environment.
        :param start_response: the response callable provided by the WSGI
                               server.
        :return: an application iterator
        """
        app_iter, status, headers = self.get_wsgi_response(environ)
        start_response(status, headers)
        return app_iter
Process this response as WSGI application.

        :param environ: the WSGI environment.
        :param start_response: the response callable provided by the WSGI
                               server.
        :return: an application iterator
        
src/werkzeug/wrappers/response.py