async def METHOD_NAME(self, data: dict[str, Any]) -> None:
    mutable_headers = MutableScopeHeaders()
    await self.session_backend.store_in_message(
        scope_session=data,
        message=fake_http_send_message(mutable_headers),
        connection=fake_asgi_connection(
            app=self.app,
            cookies=dict(self.cookies),  # type: ignore[arg-type]
        ),
    )
    response = Response(200, request=Request("GET", self.base_url), headers=mutable_headers.headers)
    cookies = Cookies(CookieJar())
    cookies.extract_cookies(response)
    self.cookies.update(cookies)  # type: ignore[union-attr]