GitHub user zentol opened a pull request:
https://github.com/apache/flink/pull/4850
[FLINK-6907][core] Extend TupleGenerator javadocs
## What is the purpose of the change
This PR extends the javadocs of the TupleGenerator classes to clarify their
responsibilities.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zentol/flink 6907
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4850.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4850
----
----
---
