code: func validateConfigMapNodeConfigSourceStatus(source *core.ConfigMapNodeConfigSource, fldPath *field.Path) field.ErrorList {
  	allErrs := field.ErrorList{}
  	// uid and resourceVersion must be set in status
  	if string(source.UID) == "" {
  		allErrs = append(allErrs, field.Required(fldPath.Child("uid"), "uid must be set in status"))
  	}
  	if source.ResourceVersion == "" {
  		allErrs = append(allErrs, field.Required(fldPath.Child("resourceVersion"), "resourceVersion must be set in status"))
  	}
  	return append(allErrs, validateConfigMapNodeConfigSource(source, fldPath)...)
  }
docs: // validation specific to Node.Status.Config.(Active|Assigned|LastKnownGood).ConfigMap