Github user anandsubbu commented on the issue:
https://github.com/apache/metron/pull/1215
Please note: I did not find the Parser Aggregation functionality documented
under the Parser Chaining README, save a mention under the parser chaining [use
case](https://github.com/apache/metron/tree/master/use-cases/parser_chaining#aggregated-parsers-with-parser-chaining).
Please let me know if it makes sense to add this to the main parser chaining
README, and I will add it.---
