make sure we follow the whole super chain

lib/src/mirror_loader.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library initialize.mirror_loader;
 
 import 'dart:collection' show Queue;
 import 'dart:mirrors';
 import 'package:path/path.dart' as path;
 import 'package:initialize/initialize.dart';
 
@@ skipping 108 matching lines @@
         }
       }
     }
 
     return queue;
   }
 
   Iterable<DeclarationMirror> _sortedDeclarationsWithMetadata(
       LibraryMirror lib) {
     return new List()
-      ..addAll(_sortDeclarations(
-          lib, lib.declarations.values.where(
-                  (d) => d is MethodMirror && d.metadata.isNotEmpty)))
-      ..addAll(_sortDeclarations(
-          lib, lib.declarations.values.where(
-                  (d) => d is ClassMirror && d.metadata.isNotEmpty)));
+      ..addAll(_sortDeclarations(lib, lib.declarations.values
+          .where((d) => d is MethodMirror && d.metadata.isNotEmpty)))
+      ..addAll(_sortDeclarations(lib, lib.declarations.values
+          .where((d) => d is ClassMirror && d.metadata.isNotEmpty)));
   }
 
   List<DeclarationMirror> _sortDeclarations(
       LibraryMirror sourceLib, Iterable<DeclarationMirror> declarations) {
     var declarationList = declarations.toList();
     declarationList.sort((DeclarationMirror a, DeclarationMirror b) {
       // If in the same file, compare by line.
       var aSourceUri = a.location.sourceUri;
       var bSourceUri = b.location.sourceUri;
       if (aSourceUri == bSourceUri) {
@@ skipping 96 matching lines @@
     return true;
   }
 }
 
 final _TOP_LEVEL_FUNCTIONS_ONLY = new UnsupportedError(
     'Only top level methods are supported for initializers');
 
 final _UNSUPPORTED_DECLARATION = new UnsupportedError(
     'Initializers are only supported on libraries, classes, and top level '
     'methods');