androidx.camera.core.impl.Observable -> go4:
# {"id":"sourceFile","fileName":"Observable.java"}
    void addObserver(java.util.concurrent.Executor,androidx.camera.core.impl.Observable$Observer) -> a
      # {"id":"com.android.tools.r8.residualsignature","signature":"(Ljava/util/concurrent/Executor;Lfo4;)V"}
    void removeObserver(androidx.camera.core.impl.Observable$Observer) -> k
      # {"id":"com.android.tools.r8.residualsignature","signature":"(Lfo4;)V"}
