Github user pnowojski commented on the issue:
https://github.com/apache/flink/pull/4239
`df6d5e0` to `5ff8106` should definitely be squashed, I left them only to
make it easier for reviewers to follow the changes made in 0.11 vs 0.10
connectors (those changes would be invisible in one blob commit).
For `321a142` to `2cf5f3b` I'm not sure about the first one,
`FlinkKafkaProducer` is that hacky that it could deserve separate commit. It
would make it stand out more if anyone in the future would look at the commit
history/changes (it could hide in larger change).
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