Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/966#issuecomment-127032575
What is the `postConfigure` method for? Input and output formats have
already the `open()` method, that is called after `configure()`. The
`configure()` method itself is somewhat of a baggage from the past, when all
code was shipped as classes + configuration, rather than via closures.
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