@RequiresApi(api = Build.VERSION_CODES.KITKAT)
  public void removeAnimatorPauseListener(Animator.AnimatorPauseListener listener) {
    animator.removePauseListener(listener);
  }
Returns the current playback speed. This will be {@literal <} 0 if the animation is playing backwards.
lottie/src/main/java/com/airbnb/lottie/LottieDrawable.java