public function getStoredConversation($message = null)
    {
        if (is_null($message)) {
            $message = $this->getMessage();
        }

        $conversation = $this->cache->get($message->getConversationIdentifier());
        if (is_null($conversation)) {
            $conversation = $this->cache->get($message->getOriginatedConversationIdentifier());
        }

        return $conversation;
    }