Completion should not show overridden inherited methods

pkg/analysis_server/test/services/completion/completion_computer_test.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 test.services.completion.suggestion;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/completion_manager.dart';
@@ skipping 163 matching lines @@
   assertFull(int fullCount) {
     expect(this.fastCount, equals(1));
     expect(this.fullCount, equals(fullCount));
   }
 
   @override
   bool computeFast(DartCompletionRequest request) {
     this.request = request;
     fastCount++;
     if (fastSuggestion != null) {
-      request.suggestions.add(fastSuggestion);
+      request.addSuggestion(fastSuggestion);
     }
     return fastSuggestion != null;
   }
 
   @override
   Future<bool> computeFull(DartCompletionRequest request) {
     this.request = request;
     fullCount++;
     if (fullSuggestion != null) {
-      request.suggestions.add(fullSuggestion);
+      request.addSuggestion(fullSuggestion);
     }
     return new Future.value(fullSuggestion != null);
   }
 }