protected function getBasePacket(MetricInterface $metric, $timestamp)
    {
        $packet = $this->buildTimestamp($timestamp);
        $packet .= $this->buildString(self::PART_TYPE_HOST, $this->host);
        $packet .= $this->buildString(self::PART_TYPE_PLUGIN, $metric->getName());
//        $packet .= $this->buildString(self::PART_TYPE_PLUGIN_INSTANCE, 'none');

        return $packet;
    }