throw exception to stop visiting

pkg/analysis_server/lib/src/services/completion/arglist_computer.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.computer.dart.arglist;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol_server.dart' hide Element,
     ElementKind;
@@ skipping 43 matching lines @@
         SimpleIdentifier selector = parent.methodName;
         if (selector != null) {
           String name = selector.name;
           if (name != null && name.length > 0) {
             if (parent.period == null) {
               /*
                * If a local declaration is found, then return null
                * indicating that suggestions were added
                * and no further action is necessary
                */
-              if (node.accept(
-                  new _LocalDeclarationFinder(request, request.offset, name))) {
+              if (new _LocalDeclarationFinder(
+                  request,
+                  request.offset,
+                  name).visit(node)) {
                 return null;
               }
             } else {
               // determine target
             }
           }
         }
       }
       return new _ArgListSuggestionBuilder(request);
     }
@@ skipping 43 matching lines @@
   }
 
   @override
   void declaredField(FieldDeclaration fieldDecl, VariableDeclaration varDecl) {
   }
 
   @override
   void declaredFunction(FunctionDeclaration declaration) {
     SimpleIdentifier selector = declaration.name;
     if (selector != null && name == selector.name) {
-      finished = true;
       _addArgListSuggestion(declaration.functionExpression.parameters);
+      finished();
     }
   }
 
   @override
   void declaredFunctionTypeAlias(FunctionTypeAlias declaration) {
   }
 
   @override
   void declaredLabel(Label label, bool isCaseLabel) {
   }
 
   @override
   void declaredLocalVar(SimpleIdentifier name, TypeName type) {
   }
 
   @override
   void declaredMethod(MethodDeclaration declaration) {
     SimpleIdentifier selector = declaration.name;
     if (selector != null && name == selector.name) {
-      finished = true;
       _addArgListSuggestion(declaration.parameters);
+      finished();
     }
   }
 
   @override
   void declaredParam(SimpleIdentifier name, TypeName type) {
   }
 
   @override
   void declaredTopLevelVar(VariableDeclarationList varList,
       VariableDeclaration varDecl) {
@@ skipping 44 matching lines @@
       if (id != null) {
         String name = id.name;
         if (name != null && name.length > 0) {
           return name;
         }
       }
     }
     return 'dynamic';
   }
 }