public void start(JScrollBar bar, InertialAnimator animator) {
      if (bar != null && shouldStart()) {
        int initValue = bar.getValue();
        int targetValue = initValue + lastDelta * getFlingMultiplier();
        animator.start(initValue, targetValue, bar::setValue, shouldStop(bar), TouchAnimationSettings.SETTINGS);
      }
    }
public void start(JScrollBar bar, InertialAnimator animator)