@Override
      public @NotNull Behavior produce() {
        ID defaults = invoke("NSUserDefaults", "standardUserDefaults");
        invoke(defaults, "synchronize");
        ID behavior = invoke(defaults, "boolForKey:", nsString("AppleScrollerPagingBehavior"));
        Behavior value = 1 == behavior.intValue() ? JumpToSpot : NextPage;
        Logger.getInstance(MacScrollBarUI.class).debug("scroll bar behavior ", value, " from ", behavior);
        return value;
      }
@Override
      public @NotNull Behavior produce()