Cleaned analysis result for observatory

runtime/observatory/tests/service/get_object_store_rpc_test.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.
 // VMOptions=--error_on_bad_type --error_on_bad_override
 
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'service_test_common.dart';
 import 'test_helper.dart';
@@ skipping 18 matching lines @@
     expect(isolate.pauseEvent is M.PauseBreakpointEvent, isTrue);
   },
 
 // Get object_store.
   (Isolate isolate) async {
     var object_store = await isolate.getObjectStore();
     expect(object_store.runtimeType, equals(ObjectStore));
     // Sanity check.
     expect(object_store.fields.length, greaterThanOrEqualTo(1));
     // Checking Closures.
-    expect(object_store.fields.singleWhere(isClosureFunctionsList), isNotNull);
-    expect(object_store.fields.singleWhere(isClosureFunctionsList).value.isList,
-        isTrue);
+    var single = object_store.fields.singleWhere(isClosureFunctionsList);
+    expect(single, isNotNull);
+    var value = single.value as Instance;
+    expect(value.isList, isTrue);
   }
 ];
 
 main(args) =>
     runIsolateTestsSynchronous(args, tests, testeeConcurrent: doDebugger);