Fix for issue 22245

pkg/analyzer/lib/src/generated/ast.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 engine.ast;
 
 import 'dart:collection';
@@ skipping 7916 matching lines @@
   @override
   Iterable get childEntities => super._childEntities
       ..add(keyword)
       ..add(_type)
       ..add(thisToken)
       ..add(period)
       ..add(identifier)
       ..add(_parameters);
 
   @override
-  Token get endToken => identifier.endToken;
+  Token get endToken {
+    if (_parameters != null) {
+      return _parameters.endToken;
+    }
+    return identifier.endToken;
+  }
 
   @override
   bool get isConst =>
       (keyword is KeywordToken) && (keyword as KeywordToken).keyword == Keyword.CONST;
 
   @override
   bool get isFinal =>
       (keyword is KeywordToken) && (keyword as KeywordToken).keyword == Keyword.FINAL;
 
   /**
@@ skipping 13604 matching lines @@
   }
 
   @override
   accept(AstVisitor visitor) => visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     safelyVisitChild(_expression, visitor);
   }
 }