suggest fields rather than synthetic getters

pkg/analysis_server/lib/src/protocol_server.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 protocol.server;
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart' as
     engine;
 import 'package:analyzer/src/generated/ast.dart' as engine;
@@ skipping 352 matching lines @@
 }
 
 
 String _getReturnTypeString(engine.Element element) {
   if (element is engine.ExecutableElement) {
     if (element.kind == engine.ElementKind.SETTER) {
       return null;
     } else {
       return element.returnType.toString();
     }
+  } else if (element is engine.VariableElement) {
+    engine.DartType type = element.type;
+    return type != null ? type.displayName : 'dynamic';
   } else {
     return null;
   }
 }
 
 bool _isAbstract(engine.Element element) {
   // TODO(scheglov) add isAbstract to Element API
   if (element is engine.ClassElement) {
     return element.isAbstract;
   }
@@ skipping 52 matching lines @@
       startColumn = offsetLocation.columnNumber;
     }
   }
   return new Location(
       source.fullName,
       range.offset,
       range.length,
       startLine,
       startColumn);
 }