anchor.diff:      ];
   
   void main() {
  -  var phases = makePhases({});
  -
  -  testPhases(
  -      'Concatenates deferred messages in pre-loaded permutations', phases, {
  -    'a|main.deferred_map': r'''
  +  group('PermutationsTransformer', () {
  +    var deferredMap = r'''
         {
           "_comment": "This mapping shows which compiled `.js` files are needed for a given deferred library import.",
           "package:a/messages_all.dart": {
  
positive.code:             ],
              "messages_bg": [
                "main.dart.js_1.part.js"
              ]
            }
          }
        }
      ''',
      'a|main.dart.js': 'content of main.dart.js',
      'a|main.dart.js_1.part.js': 'content of main.dart.js_1.part.js',
      'a|main.dart.js_2.part.js': 'content of main.dart.js_2.part.js',
    }, {
      'a|main_ar.js': 'content of main.dart.js\n'
          'content of main.dart.js_2.part.js',
      'a|main_bg.js': 'content of main.dart.js\n'
          'content of main.dart.js_1.part.js',
    });
  }
  
negative.code: import 'package:scissors/src/permutations/transformer.dart';
  
  import 'package:code_transformers/tests.dart' show testPhases;
  import 'package:test/test.dart';
  
  makePhases(Map config) => [
        [
  