anchor.diff:      constantInitializers
         SuperConstructorInvocation
           argumentList: ArgumentList
  -        staticElement: file:///a.dart::@class::Base::@constructor::•
  +        staticElement: package:test/a.dart::@class::Base::@constructor::•
     synthetic const MixinApp.named();
       constantInitializers
         SuperConstructorInvocation
           argumentList: ArgumentList
           constructorName: SimpleIdentifier
  -          staticElement: file:///a.dart::@class::Base::@constructor::named
  +          staticElement: package:test/a.dart::@class::Base::@constructor::named
             staticType: null
             token: named
  -        staticElement: file:///a.dart::@class::Base::@constructor::named
  +        staticElement: package:test/a.dart::@class::Base::@constructor::named
   }
   ''',
           withFullyResolvedAst: true);
  
positive.code:   }
  
    test_class_alias_with_const_constructors() async {
      addLibrarySource('/a.dart', '''
  class Base {
    const Base._priv();
    const Base();
  
negative.code:     checkElementText(
          library,
          r'''
  import 'package:test/a.dart';
  class M {
  }
  class alias MixinApp extends Base with M {
  