/**
  * Validates given $intentions.
  *
  * @param ParametersIntentionInterface $intention
  *
  * @throws InvalidArgumentException
  */
 protected function validate(ParametersIntentionInterface $intention)
 {
     $errors = $intention->validate();
     if ($errors->count() > 0) {
         throw new InvalidArgumentException($errors);
     }
 }