Issue 19670. 'Create field' quick fix.

pkg/analysis_server/lib/src/services/correction/fix.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 services.correction.fix;
 
 import 'package:analysis_server/src/protocol.dart' show SourceChange;
 import 'package:analysis_server/src/services/correction/fix_internal.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 44 matching lines @@
       50,
       "Change access to static using '{0}'");
   static const CREATE_CLASS =
       const FixKind('CREATE_CLASS', 50, "Create class '{0}'");
   static const CREATE_CONSTRUCTOR =
       const FixKind('CREATE_CONSTRUCTOR', 50, "Create constructor '{0}'");
   static const CREATE_CONSTRUCTOR_SUPER = const FixKind(
       'CREATE_CONSTRUCTOR_SUPER',
       50,
       "Create constructor to call {0}");
+  static const CREATE_FIELD =
+      const FixKind('CREATE_FIELD', 50, "Create field '{0}'");
   static const CREATE_FILE =
       const FixKind('CREATE_FILE', 50, "Create file '{0}'");
   static const CREATE_FUNCTION =
       const FixKind('CREATE_FUNCTION', 49, "Create function '{0}'");
   static const CREATE_METHOD =
       const FixKind('CREATE_METHOD', 50, "Create method '{0}'");
   static const CREATE_MISSING_OVERRIDES = const FixKind(
       'CREATE_MISSING_OVERRIDES',
       50,
       "Create {0} missing override(s)");
@@ skipping 45 matching lines @@
 
   final name;
   final int relevance;
   final String message;
 
   const FixKind(this.name, this.relevance, this.message);
 
   @override
   String toString() => name;
 }