protected function handleVoiceServerUpdate($data)
    {
        if (isset($this->voiceClients[$data->d->guild_id])) {
            $this->logger->debug('voice server update received', ['guild' => $data->d->guild_id, 'data' => $data->d]);
            $this->voiceClients[$data->d->guild_id]->handleVoiceServerChange((array) $data->d);
        }
    }