public boolean removeLottieOnCompositionLoadedListener(@NonNull LottieOnCompositionLoadedListener lottieOnCompositionLoadedListener) {
    return lottieOnCompositionLoadedListeners.remove(lottieOnCompositionLoadedListener);
  }
This API no longer has any effect.
lottie/src/main/java/com/airbnb/lottie/LottieAnimationView.java