Hi everyone, pretty much every connector utilizes checks from the org.apache.flink.util.Preconditions class, which is currently marked as @Internal. This causes CONNECTOR_CLASSES_ONLY_DEPEND_ON_PUBLIC_API architecture tests to fail and results in the violation exceptions being filled with the lines like this: https://github.com/apache/flink-connector-kafka/blob/8d531898d7df775535084e0413442c86a4c497ed/flink-connector-kafka/archunit-violations/984f05c0-ec82-405e-9bcc-d202dbe7202e#L22-L27
I'd like to propose to mark the Preconditions class as @Public of @PublicEvolving. There are also some other similar candidates, like ClosureCleaner, but the Preconditions is by far the most widespread. Alternatively we could add an exception to the ArchRule definition. What do you think? Best, Alex
