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getting some proguard compilation warnings after upgrading to `kotlinx.coroutines 1.2.0` :

```
Warning: kotlinx.atomicfu.AtomicFU: can't find referenced method 'void setInterceptor(kotlinx.atomicfu.AtomicOperationInterceptor)' in program class kotlinx.atomicfu.InterceptorKt
```

Proguard is configured as per `kotlinx-coroutines-core/resources/META-INF/proguard/coroutines.pro`. I can easily solve this warning by adding a rule to keep the corresponding atomicfu class and its methods, but i was wondering whether it's safe to `-dontwarn` it. I have no warnings when using  v1.1.1. Anyone experiencing a similar issue?

For now im going with `-dontwarn kotlinx.atomicfu.**`, not sure if it breaks something

me neither. that was my original question. i've temporary used `-keep` but obviously i would like to avoid to poison the proguard configuration file with unnecessary keep rules