I have metricbeat collecting the socket_summary metricset of the system module.
I see on github
[socket_summary](https://github.com/elastic/beats/blob/master/metricbeat/module/system/socket_summary/socket_summary.go) there seem to be counters for syn_recv in the socket_summary code but these metrics don't seem to be stored in Elasticsearch. Is that because of a technical difficulty?
What would it take to also collect these metrics?