@SuppressWarnings("UnusedParameters")
  public static @NotNull ScrollBarUI createUI(JComponent c, boolean isThin) {
    if (SystemInfo.isMac) {
      return isThin ? new ThinMacScrollBarUI() : new MacScrollBarUI();
    }
    else {
      return isThin ? new ThinScrollBarUI() : new DefaultScrollBarUI();
    }
  }
@SuppressWarnings("UnusedParameters")
  public static @NotNull ScrollBarUI createUI(JComponent c, boolean isThin)