public static function delete_data_for_all_users_in_context(\context $context) {
        // Delete all Calendar Events in the specified context in batches.
        if ($eventids = array_keys(self::get_calendar_event_ids_by_context($context))) {
            self::delete_batch_records('event', 'id', $eventids);
        }

        // Delete all Calendar Subscriptions in the specified context in batches.
        if ($subscriptionids = array_keys(self::get_calendar_subscription_ids_by_context($context))) {
            self::delete_batch_records('event_subscriptions', 'id', $subscriptionids);
        }
    }