code: func evaluatorsByGroupResource(items []quota.Evaluator) map[schema.GroupResource]quota.Evaluator {
  	result := map[schema.GroupResource]quota.Evaluator{}
  	for _, item := range items {
  		result[item.GroupResource()] = item
  	}
  	return result
  }
docs: // evaluatorsByGroupResource converts a list of evaluators to a map by group resource.