Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/2305
As I said, I think it would be very good to change the return type to
`SingleOutputStreamOperator`. However, breaking binary compatibility should
also not be taken lightly.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
