code: func NewPlugin(nodeIdentifier nodeidentifier.NodeIdentifier) *nodePlugin {
  	return &nodePlugin{
  		Handler:        admission.NewHandler(admission.Create, admission.Update, admission.Delete),
  		nodeIdentifier: nodeIdentifier,
  		features:       utilfeature.DefaultFeatureGate,
  	}
  }
docs: // NewPlugin creates a new NodeRestriction admission plugin.
  // This plugin identifies requests from nodes