Clear analyzer warning on Observatory

runtime/observatory/lib/src/models/repositories/sample_profile.dart

 // Copyright (c) 2016, 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
 
 part of models;
 
 enum SampleProfileTag { userVM, userOnly, vmUser, vmOnly, none }
 
 enum SampleProfileLoadingStatus { disabled, fetching, loading, loaded }
 
@@ skipping 16 matching lines @@
 abstract class SampleProfileLoadingProgress {
   SampleProfileLoadingStatus get status;
   double get progress;
   Duration get fetchingTime;
   Duration get loadingTime;
   SampleProfile get profile;
 }
 
 abstract class ClassSampleProfileRepository {
   Stream<SampleProfileLoadingProgressEvent> get(
-      IsolateRef isolate, ClassRef cls, SampleProfileTag tag);
+      IsolateRef isolate, ClassRef cls, SampleProfileTag tag,
+      {bool clear: false, bool forceFetch: false});
   Future enable(IsolateRef isolate, ClassRef cls);
   Future disable(IsolateRef isolate, ClassRef cls);
 }
 
 abstract class IsolateSampleProfileRepository {
   Stream<SampleProfileLoadingProgressEvent> get(
       IsolateRef isolate, SampleProfileTag tag,
       {bool clear: false, bool forceFetch: false});
 }
 
 abstract class NativeMemorySampleProfileRepository {
   Stream<SampleProfileLoadingProgressEvent> get(VM vm, SampleProfileTag tag,
       {bool clear: false, bool forceFetch: false});
 }