code: private void initializeAngleAnimator() {
          angleAnimator = ObjectAnimator.ofFloat(this, createAngleProperty(), MAX_DEGREES);
          angleAnimator.setInterpolator(new LinearInterpolator());
          angleAnimator.setDuration(ANGLE_ANIMATION_DURATION);
          angleAnimator.setRepeatMode(ValueAnimator.RESTART);
          angleAnimator.setRepeatCount(ValueAnimator.INFINITE);
      }
docs: Initializes the angle animator.