Use local variable/function index in its enclosing executable as a part of the identifier.

pkg/analyzer/lib/src/context/cache.dart

 // Copyright (c) 2015, 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.context.cache;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 328 matching lines @@
    * A bit-encoding of boolean flags associated with this entry's target.
    */
   int _flags = 0;
 
   /**
    * A table mapping result descriptors to the cached values of those results.
    */
   Map<ResultDescriptor, ResultData> _resultMap =
       new HashMap<ResultDescriptor, ResultData>();
 
-  CacheEntry(this.target) {
-    _markAsCacheKey(target);
-  }
+  CacheEntry(this.target);
 
   /**
    * The exception that caused one or more values to have a state of
    * [CacheState.ERROR].
    */
   CaughtException get exception => _exception;
 
   /**
    * Return `true` if the source was explicitly added to the context or `false`
    * if the source was implicitly added because it was referenced by another
@@ skipping 28 matching lines @@
             ResultData data =
                 entry.getResultDataOrNull(dependedOnResult.result);
             if (data != null) {
               data.dependentResults.remove(result);
             }
           }
         }
       }
     });
     _resultMap.clear();
-    AnalysisTarget oldTarget = target;
-    if (oldTarget is ElementImpl) {
-      oldTarget.setModifier(Modifier.CACHE_KEY, false);
-    }
   }
 
   /**
    * Fix the state of the [exception] to match the current state of the entry.
    */
   void fixExceptionState() {
     if (!hasErrorState()) {
       _exception = null;
     }
   }
@@ skipping 334 matching lines @@
         AnalysisCache cache = caches[j];
         CacheEntry entry = cache.get(dependentResult.target);
         if (entry != null) {
           entry._invalidate(id, dependentResult.result, delta, level);
         }
       }
     }
   }
 
   /**
-   * If the given `target` is an element, mark it as being a cache key.
-   */
-  void _markAsCacheKey(AnalysisTarget target) {
-    if (target is ElementImpl) {
-      target.setModifier(Modifier.CACHE_KEY, true);
-    }
-  }
-
-  /**
    * Set the [dependedOn] on which this result depends.
    */
   void _setDependedOnResults(ResultData thisData, TargetedResult thisResult,
       List<TargetedResult> dependedOn) {
     List<AnalysisCache> caches = _partition.containingCaches;
     int cacheLength = caches.length;
 
     List<TargetedResult> oldResults = thisData.dependedOnResults;
     int oldLength = oldResults.length;
     for (int i = 0; i < oldLength; i++) {
@@ skipping 730 matching lines @@
   void resultAccessed(TargetedResult result) {}
 
   @override
   List<TargetedResult> resultStored(TargetedResult newResult, newValue) {
     return TargetedResult.EMPTY_LIST;
   }
 
   @override
   void targetRemoved(AnalysisTarget target) {}
 }