Create lazy (Const)FieldElementImpl.

pkg/analyzer/lib/src/dart/element/element.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 analyzer.src.dart.element.element;
 
 import 'dart:collection';
 import 'dart:math' show min;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 1516 matching lines @@
   /**
    * Initialize a newly created synthetic field element to have the given
    * [name] and [offset].
    */
   ConstFieldElementImpl(String name, int offset) : super(name, offset);
 
   /**
    * Initialize a newly created field element to have the given [name].
    */
   ConstFieldElementImpl.forNode(Identifier name) : super.forNode(name);
+
+  /**
+   * Initialize using the given serialized information.
+   */
+  ConstFieldElementImpl.forSerialized(
+      UnlinkedVariable unlinkedVariable, ElementImpl enclosingElement)
+      : super.forSerialized(unlinkedVariable, enclosingElement);
 }
 
 /**
  * A [LocalVariableElement] for a local 'const' variable that has an
  * initializer.
  */
 class ConstLocalVariableElementImpl extends LocalVariableElementImpl
     with ConstVariableElement {
   /**
    * Initialize a newly created local variable element to have the given [name]
@@ skipping 1731 matching lines @@
    * Initialize a newly created synthetic field element to have the given [name]
    * at the given [offset].
    */
   FieldElementImpl(String name, int offset) : super(name, offset);
 
   /**
    * Initialize a newly created field element to have the given [name].
    */
   FieldElementImpl.forNode(Identifier name) : super.forNode(name);
 
+  /**
+   * Initialize using the given serialized information.
+   */
+  FieldElementImpl.forSerialized(
+      UnlinkedVariable unlinkedVariable, ElementImpl enclosingElement)
+      : super.forSerialized(unlinkedVariable, enclosingElement);
+
   @override
   ClassElement get enclosingElement => super.enclosingElement as ClassElement;
 
   @override
   bool get isEnumConstant =>
       enclosingElement != null ? enclosingElement.isEnum : false;
 
   @override
   ElementKind get kind => ElementKind.FIELD;
 
@@ skipping 3610 matching lines @@
 
   @override
   void visitElement(Element element) {
     int offset = element.nameOffset;
     if (offset != -1) {
       map[offset] = element;
     }
     super.visitElement(element);
   }
 }