kotlinx.coroutines.sync.MutexKt -> sg4:
# {"id":"sourceFile","fileName":"Mutex.kt"}
    kotlinx.coroutines.internal.Symbol NO_OWNER -> a
      # {"id":"com.android.tools.r8.residualsignature","signature":"Lsi0;"}
    1:11:void <clinit>():304:304 -> <clinit>
