Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4833#discussion_r145728875
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/GeneratedAggregations.scala
---
@@ -67,7 +67,7 @@ abstract class GeneratedAggregations extends Function {
* aggregated results
* @param input input values bundled in a row
--- End diff --
Please add `@returns` documentation---
