Github user greghogan commented on the issue:
https://github.com/apache/flink/pull/4086
If the long-term plan is to have one checkstyle then we should keep the
current plain name. We may be at the point where we can rename the checkstyles
and update the in-progress modules to use a `relaxed-checkstyle.xml`.
I have not seen IntelliJ actually import settings from a checkstyle
configuration. Not sure if this is user error or something is broken.
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