Element no longer implements AnalysisTarget

pkg/analyzer/lib/src/generated/incremental_resolver.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.generated.incremental_resolver;
 
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 2047 matching lines @@
   final int updateDelta;
   final AnalysisCache cache;
 
   _ElementOffsetUpdater(this.updateOffset, this.updateDelta, this.cache);
 
   @override
   visitElement(Element element) {
     // name offset
     int nameOffset = element.nameOffset;
     if (nameOffset > updateOffset) {
-      cache.remove(element);
+      if (element is AnalysisTarget) {
+        cache.remove(element as AnalysisTarget);

[Brian Wilkerson, 2016/02/01 15:43:20]

Is the cast necessary? I would have thought that type propagation would be
sufficient.

+      }
       (element as ElementImpl).nameOffset = nameOffset + updateDelta;
     }
     // visible range
     if (element is LocalElement) {
       SourceRange visibleRange = element.visibleRange;
       if (visibleRange != null && visibleRange.offset > updateOffset) {
         int newOffset = visibleRange.offset + updateDelta;
         int length = visibleRange.length;
         if (element is FunctionElementImpl) {
-          cache.remove(element);
           element.setVisibleRange(newOffset, length);
         } else if (element is LocalVariableElementImpl) {
           cache.remove(element);
           element.setVisibleRange(newOffset, length);
         } else if (element is ParameterElementImpl) {
           cache.remove(element);
           element.setVisibleRange(newOffset, length);
         }
       }
     }
@@ skipping 71 matching lines @@
   @override
   String toString() => name;
 }
 
 class _TokenPair {
   final _TokenDifferenceKind kind;
   final Token oldToken;
   final Token newToken;
   _TokenPair(this.kind, this.oldToken, this.newToken);
 }