Kraken\Channel\Model\Zmq\ZmqModel::recvHeartbeat PHP Method

    private function recvHeartbeat(Connection $conn)
    {
        if ($this->flags['enableHeartbeat'] !== true) {
            return;
        }
        if ($this->connectionPool->setConnection($conn->id)) {
            $this->emit('connect', [$conn->getId()]);
        }
        if ($this->type === self::BINDER) {
            $this->heartbeat($conn->id);
        }
    }