code: func ValidateIngressStatusUpdate(ingress, oldIngress *extensions.Ingress) field.ErrorList {
  	allErrs := apivalidation.ValidateObjectMetaUpdate(&ingress.ObjectMeta, &oldIngress.ObjectMeta, field.NewPath("metadata"))
  	allErrs = append(allErrs, apivalidation.ValidateLoadBalancerStatus(&ingress.Status.LoadBalancer, field.NewPath("status", "loadBalancer"))...)
  	return allErrs
  }
docs: // ValidateIngressStatusUpdate tests if required fields in the Ingress are set when updating status.