Github user zentol commented on the issue:
https://github.com/apache/flink/pull/3495
I would use the class name, as otherwise we add an additional source of
mistakes. When introducing the `ConfigGroups` annotation the first time; if the
configured default name doesn't match the class name the docs will break if not
adjusted properly.
In my mind when you want to extract some options into a separate table for
the docs you should only have to worry about exactly that, and not about
breaking the docs for the rest of the class.
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