anchor.diff:     * Record the translation for this message in the given locale, after
      * suitably escaping it.
      */
  -  String addTranslation(String locale, Message translated) {
  +  void addTranslation(String locale, Message translated) {
         translated.parent = this;
         translations[locale] = translated.toCode();
     }
  
positive.code:       return "The 'name' argument for Intl.message must be a simple string "
            "literal.";
      }
      var simpleArguments = arguments.where(
          (each) => each is NamedExpression
          && ["desc", "name"].contains(each.name.label.name));
  
negative.code:             "a simple string literal";
        }
      }
      return null;
    }
  
    /**
  