'Rename Local Variable' refactoring implementation.

pkg/analysis_services/lib/search/hierarchy.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 services.hierarchy;
 
 import 'dart:async';
@@ skipping 181 matching lines @@
     for (InterfaceType intf in current.interfaces) {
       queue.add(intf.element);
     }
   }
   // we don't need "seed" itself
   result.remove(seed);
   return result;
 }
 
 
+/**
+ * If the given [element] is a synthetic [PropertyAccessorElement] returns
+ * its variable, otherwise returns [element].
+ */
+Element getSyntheticAccessorVariable(Element element) {
+  if (element is PropertyAccessorElement) {
+    if (element.isSynthetic) {
+      return element.variable;
+    }
+  }
+  return element;
+}
+
+
 typedef void _ElementProcessor(Element element);
 
 /**
  * A [GeneralizingElementVisitor] adapter for [_ElementProcessor].
  */
 class _ElementVisitorAdapter extends GeneralizingElementVisitor {
   final _ElementProcessor processor;
 
   _ElementVisitorAdapter(this.processor);
 
   @override
   void visitElement(Element element) {
     processor(element);
   }
 }