Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/1218
This change was reverted
[here](https://github.com/apache/metron/commit/0e037edad913955d3b6754ca9cf42b329cd84160).
A new pull request will be opened with the functionality. See also [this
mailing list
thread](https://github.com/apache/metron/commit/0e037edad913955d3b6754ca9cf42b329cd84160).---
