docs: public static void setLookAndFeel() {
      try {
        if(PREFER_GTK) {
          LookAndFeelInfo[] lfs = UIManager.getInstalledLookAndFeels();
          for(LookAndFeelInfo lf : lfs) {
            if(lf.getClassName().contains("GTK")) {
              UIManager.setLookAndFeel(lf.getClassName());
              return;
            }
          }
        }
        // Fallback:
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
      }
      catch(Exception e) {
        // ignore
      }
    }