protected Set<String> allowedDuplicateErrorCodes(){
  return Collections.emptySet();
}

protected Set < String > allowedDuplicateErrorCodes ( ) { return Collections . emptySet ( ) ; }
override this if the should_not_contain_same_error_codes_for_different_instances_that_are_not_wrappers test is failing and you * really * want to allow one or more of your error codes to have duplicate apierrors that are not wrappers . this should be used with care .
