suggest fields rather than synthetic getters

pkg/analysis_server/test/protocol_server_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.computer.element;
 
 import 'dart:mirrors';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol_server.dart';
@@ skipping 286 matching lines @@
     expect(element.name, 'myField');
     {
       Location location = element.location;
       expect(location.file, '/test.dart');
       expect(location.offset, 25);
       expect(location.length, 'myField'.length);
       expect(location.startLine, 2);
       expect(location.startColumn, 16);
     }
     expect(element.parameters, isNull);
-    expect(element.returnType, isNull);
+    expect(element.returnType, 'dynamic');
     expect(element.flags, Element.FLAG_CONST | Element.FLAG_STATIC);
   }
 
   void test_fromElement_GETTER() {
     engine.Source source = addSource('/test.dart', '''
 class A {
   String get myGetter => 42;
 }''');
     engine.CompilationUnit unit = resolveLibraryUnit(source);
     engine.PropertyAccessorElement engineElement =
@@ skipping 174 matching lines @@
           ApiEnum apiValue = convert(engineValue);
           expect(apiValue, equals(expectedResult));
         }
       } else {
         ApiEnum apiValue = convert(engineValue);
         expect(apiValue.name, equals(enumName));
       }
     });
   }
 }