def METHOD_NAME(self, event: GroupEvent) -> RpcSentryApp | None:
    extra = {"event_id": event.event_id}
    sentry_app_installation_uuid = self.get_option("sentryAppInstallationUuid")
    if not sentry_app_installation_uuid:
        self.logger.info("rules.fail.is_configured", extra=extra)
        return None
    result = app_service.get_many(filter=dict(uuids=[sentry_app_installation_uuid]))
    if result:
        return result[0].sentry_app
    self.logger.info("rules.fail.no_app", extra=extra)
    return None