private static synchronized void setLookAndFeelProperties(LookAndFeel lookAndFeel) {
    if (lookAndFeel == null) {
      return;
    }

    String packagePrefix = "com.michaelbaranov.microba.";

    // all L&F
    UIManager.put("microba.CalendarPaneUI", packagePrefix + "calendar.ui.basic.BasicCalendarPaneUI");
    UIManager.put(packagePrefix + "calendar.ui.basic.BasicCalendarPaneUI", BasicCalendarPaneUI.class);
    UIManager.put("microba.DatePickerUI", packagePrefix + "calendar.ui.basic.BasicDatePickerUI");
    UIManager.put(packagePrefix + "calendar.ui.basic.BasicDatePickerUI", BasicDatePickerUI.class);
  }
private static synchronized void setLookAndFeelProperties(LookAndFeel lookAndFeel)