Github user zentol commented on the issue:
https://github.com/apache/flink/pull/3495
I love this issue, it's just so damn interesting.
You can find an implementation of my approach
[here](https://github.com/zentol/flink/commit/2c40e660a883ec4db28cf92913daf0a103563fc8).
First we generate a tree structure containing all ConfigOptions, based on
the components of the key. We then insert the ConfigGroups into the
corresponding nodes, marking sub trees. Finally, for each ConfigGroup we
recursively search the entire tree, extracting all ConfigOptions that are
contained in the sub tree of the ConfigGroup, that are not part of another,
more specific, ConfigGroup.
It also as a separate branch for *Options classes that don't have any
annotation, making them optional.
---
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.
---
