force example

 catch (\Throwable $e) {
                $exceptions[] = $e;
            }
        }

        /** @var FlushBatchHandlersStamp $flushStamp */
        if ($flushStamp = $envelope->last(FlushBatchHandlersStamp::class)) {
            /** @var NoAutoAckStamp $stamp */
            foreach ($envelope->all(NoAutoAckStamp::class) as $stamp) {
                try {
                    $handler = $stamp->getHandlerDescriptor()->getBatchHandler();
                    $handler->flush($flushStamp->force());
                } catch (\Throwable $e) {
                    $exceptions[] = $e;
                }
            }
        }

        if (null === $handler && !$alreadyHandled) {
            if (!$this->allowNoHandlers) {
                throw new NoHandlerForMessageException(sprintf('No handler for message "%s".', $context['class']));
            }