code: private void animateView(final int position, @NonNull final View view, @NonNull final Animator[] animators) {
          if (mAnimationStartMillis == -1) {
              mAnimationStartMillis = SystemClock.uptimeMillis();
          }
  
          ViewHelper.setAlpha(view, 0);
  
          AnimatorSet set = new AnimatorSet();
          set.playTogether(animators);
          set.setStartDelay(calculateAnimationDelay(position));
          set.setDuration(mAnimationDurationMillis);
          set.start();
  
          mAnimators.put(view.hashCode(), set);
      }
docs: Animates given View.
  
  @param view the View that should be animated.