code: func (strategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
  	newClusterRole := obj.(*rbac.ClusterRole)
  	oldClusterRole := old.(*rbac.ClusterRole)
  
  	_, _ = newClusterRole, oldClusterRole
  }
docs: // PrepareForUpdate clears fields that are not allowed to be set by end users on update.