code: func ValidateServiceStatusUpdate(service, oldService *core.Service) field.ErrorList {
  	allErrs := ValidateObjectMetaUpdate(&service.ObjectMeta, &oldService.ObjectMeta, field.NewPath("metadata"))
  	allErrs = append(allErrs, ValidateLoadBalancerStatus(&service.Status.LoadBalancer, field.NewPath("status", "loadBalancer"))...)
  	return allErrs
  }
docs: // ValidateServiceStatusUpdate tests if required fields in the Service are set when updating status.