code: public function bootstrap($app)
      {
          Yii::beginProfile(get_called_class());
          Yii::$app->modules = static::getModules();
          Yii::$app->on(\yii\base\Application::EVENT_BEFORE_REQUEST, [$this, 'beforeRequest']);
          Yii::endProfile(get_called_class());
          Yii::trace("Registered " . count(static::getModules()) . " modules in " . get_called_class());
      }
docs: Bootstrap the module set on load.
  
  @param Application $app the application parameter