pkg/docgen: sort output files

pkg/docgen/lib/src/model_helpers.dart

 // Copyright (c) 2014, 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 docgen.model_helpers;
 
+import 'dart:collection';
+
 import '../../../../sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirrors.dart'
     as dart2js_mirrors;
 import '../../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors_util.dart'
     as dart2js_util;
 import '../../../../sdk/lib/_internal/compiler/implementation/mirrors/source_mirrors.dart';
 import '../../../../sdk/lib/_internal/libraries.dart';
 
 import 'library_helpers.dart' show includePrivateMembers;
 import 'models.dart';
 import 'package_helpers.dart';
@@ skipping 23 matching lines @@
     return (mirror.isPrivate || _isLibraryPrivate(mirror.owner) ||
         mirror.isNameSynthetic);
   } else {
     return (mirror.isPrivate || isHidden(mirror.owner) ||
         mirror.isNameSynthetic);
   }
 }
 
 /// Transforms the map by calling toMap on each value in it.
 Map recurseMap(Map inputMap) {
-  var outputMap = {};
+  var outputMap = new SplayTreeMap();
   inputMap.forEach((key, value) {
     if (value is Map) {
       outputMap[key] = recurseMap(value);
     } else {
       outputMap[key] = value.toMap();
     }
   });
   return outputMap;
 }
 
@@ skipping 157 matching lines @@
   // the time.
   var sdkLibrary = LIBRARIES[dart2js_util.nameOf(mirror)];
   if (sdkLibrary != null) {
     return !sdkLibrary.documented;
   } else if (dart2js_util.nameOf(mirror).startsWith('_') || dart2js_util.nameOf(
       mirror).contains('._')) {
     return true;
   }
   return false;
 }