do not suggest local functions

pkg/analysis_server/lib/src/services/completion/dart_completion_cache.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 services.completion.dart.cache;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analysis_server/src/protocol_server.dart'
@@ skipping 292 matching lines @@
         }
       }
     });
   }
 
   /**
    * Add a suggestion for the given element.
    */
   void _addSuggestion(Element element, int relevance) {
     if (element is ExecutableElement) {
+      // Do not suggest operators or local functions
       if (element.isOperator) {
         return;
       }
+      if (element is FunctionElement) {
+        if (element.enclosingElement is! CompilationUnitElement) {
+          return;
+        }
+      }
     }
 
     CompletionSuggestion suggestion =
         createSuggestion(element, relevance: relevance);
 
     if (element is ExecutableElement) {
       DartType returnType = element.returnType;
       if (returnType != null && returnType.isVoid) {
         importedVoidReturnSuggestions.add(suggestion);
       } else {
@@ skipping 72 matching lines @@
   @override
   void visitFunctionTypeAliasElement(FunctionTypeAliasElement element) {
     cache._addSuggestion(element, DART_RELEVANCE_DEFAULT);
   }
 
   @override
   void visitTopLevelVariableElement(TopLevelVariableElement element) {
     cache._addSuggestion(element, DART_RELEVANCE_DEFAULT);
   }
 }