code: func Register(plugins *admission.Plugins) {
  	plugins.Register(PluginName, func(config io.Reader) (admission.Interface, error) {
  		// TODO move this to a versioned configuration file format.
  		pluginConfig := readConfig(config)
  		plugin := NewPodNodeSelector(pluginConfig.PodNodeSelectorPluginConfig)
  		return plugin, nil
  	})
  }
docs: // Register registers a plugin