Issue 17389. Analyzer snapshot and server tweaks to use new ParameterElement.defaultValueCode.

pkg/analyzer/lib/src/generated/element_handle.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.element_handle;
 
 import 'ast.dart';
@@ skipping 795 matching lines @@
  */
 class ParameterElementHandle extends VariableElementHandle implements ParameterElement {
   /**
    * Initialize a newly created element handle to represent the given element.
    *
    * @param element the element being represented
    */
   ParameterElementHandle(ParameterElement element) : super(element);
 
   @override
-  SourceRange get defaultValueRange => actualElement.defaultValueRange;
+  String get defaultValueCode => actualElement.defaultValueCode;
 
   @override
   ElementKind get kind => ElementKind.PARAMETER;
 
   @override
   ParameterKind get parameterKind => actualElement.parameterKind;
 
   @override
   List<ParameterElement> get parameters => actualElement.parameters;
 
@@ skipping 174 matching lines @@
   VariableElement get actualElement => super.actualElement as VariableElement;
 }
 /**
  * TODO(scheglov) invalid implementation
  */
 class WeakReference<T> {
   final T value;
   WeakReference(this.value);
   T get() => value;
 }