code: func (nodeStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
  	node := obj.(*api.Node)
  	// Nodes allow *all* fields, including status, to be set on create.
  	if !utilfeature.DefaultFeatureGate.Enabled(features.DynamicKubeletConfig) {
  		node.Spec.ConfigSource = nil
  		node.Status.Config = nil
  	}
  }
docs: // PrepareForCreate clears fields that are not allowed to be set by end users on creation.