Github user shijinkui commented on the issue:
https://github.com/apache/flink/pull/2874
> The PR changes several @Public and @PublicEvolving methods.
hi, @fhueske
Today when set some config, find some function cant't chained one by one.
So want to complete all the function needed `return this` conveniently. If
chained setting config, the setting will be together, avoid setting config
evrywhere.
It's only better used, not important. You can close this. Failed building
is noisy.
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