code: func IsWebhookConfigurationResource(attr admission.Attributes) bool {
  	gvk := attr.GetKind()
  	if gvk.Group == "admissionregistration.k8s.io" {
  		if gvk.Kind == "ValidatingWebhookConfiguration" || gvk.Kind == "MutatingWebhookConfiguration" {
  			return true
  		}
  	}
  	return false
  }
docs: // IsWebhookConfigurationResource determines if an admission.Attributes object is describing
  // the admission of a ValidatingWebhookConfiguration or a MutatingWebhookConfiguration