code: public function has($id, $checkInstance = false)
      {
          return parent::has($id, $checkInstance) || (isset($this->module) && $this->module->has($id, $checkInstance));
      }
docs: {@inheritdoc}
  
  Since version 2.0.13, if a component isn't defined in the module, it will be looked up in the parent module.
  The parent module may be the application.