code: func (m *ManagerImpl) GetWatcherHandler() watcher.PluginHandler {
  	if f, err := os.Create(m.socketdir + "DEPRECATION"); err != nil {
  		klog.Errorf("Failed to create deprecation file at %s", m.socketdir)
  	} else {
  		f.Close()
  		klog.V(4).Infof("created deprecation file %s", f.Name())
  	}
  
  	return watcher.PluginHandler(m)
  }
docs: // GetWatcherHandler returns the plugin handler