public function run()
    {
        foreach ($this->pubsub as $message) {
            $kind = $message->kind;

            if ($kind !== Consumer::MESSAGE && $kind !== Consumer::PMESSAGE) {
                if (isset($this->subscriptionCallback)) {
                    $callback = $this->subscriptionCallback;
                    call_user_func($callback, $message);
                }

                continue;
            }

            if (isset($this->callbacks[$message->channel])) {
                $callback = $this->callbacks[$message->channel];
                call_user_func($callback, $message->payload);
            } elseif (isset($this->defaultCallback)) {
                $callback = $this->defaultCallback;
                call_user_func($callback, $message);
            }
        }
    }