code: func (op *updateOp) validateRange(ctx context.Context, sync *NodeSync, node *v1.Node, aliasRange *net.IPNet) error {
  	if node.Spec.PodCIDR != aliasRange.String() {
  		klog.Errorf("Inconsistency detected between node PodCIDR and node alias (%v != %v)",
  			node.Spec.PodCIDR, aliasRange)
  		sync.kubeAPI.EmitNodeWarningEvent(node.Name, MismatchEvent,
  			"Node.Spec.PodCIDR != cloud alias (%v != %v)", node.Spec.PodCIDR, aliasRange)
  		// User intervention is required in this case, as this is most likely due
  		// to the user mucking around with their VM aliases on the side.
  	} else {
  		klog.V(4).Infof("Node %q CIDR range %v is matches cloud assignment", node.Name, node.Spec.PodCIDR)
  	}
  	return nil
  }
docs: // validateRange checks that the allocated range and the alias range
  // match.