Github user cestella commented on the issue:
https://github.com/apache/metron/pull/942
So, I would suggest rather than accepting a list of stats objects, `MAX`
and `MIN` accept one of the following:
* A StatisticsProvider object
* A list of comparables
Essentially, these two would both function:
* `MAX(STATS_ADD(null, 1, 2, 3))`
* `MAX([1, 2, 3])`---
