code: public static void main(String[] args) {
          CommonApp.prepareSwingEnvironment();
          OptaPlannerExamplesApp optaPlannerExamplesApp = new OptaPlannerExamplesApp();
          optaPlannerExamplesApp.pack();
          optaPlannerExamplesApp.setLocationRelativeTo(null);
          optaPlannerExamplesApp.setVisible(true);
      }
docs: Supported system properties: {@link CommonApp#DATA_DIR_SYSTEM_PROPERTY}.
  @param args never null