Use typed RefactoringOptions in the Dart version of the protocol.

editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/AnalysisServer.java

 /*
  * Copyright (c) 2014, the Dart project authors.
  *
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  *
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 270 matching lines @@
    * @param offset The offset of the region involved in the refactoring.
    * @param length The length of the region involved in the refactoring.
    * @param validateOnly True if the client is only requesting that the values of the options be
    *         validated and no change be generated.
    * @param options Data used to provide values provided by the user. The structure of the data is
    *         dependent on the kind of refactoring being performed. The data that is expected is
    *         documented in the section titled Refactorings, labeled as “Options”. This field can be
    *         omitted if the refactoring does not require any options or if the values of those
    *         options are not known.
    */
-  public void edit_getRefactoring(String kind, String file, Integer offset, Integer length, Boolean validateOnly, Object options, GetRefactoringConsumer consumer);
+  public void edit_getRefactoring(String kind, String file, Integer offset, Integer length, Boolean validateOnly, RefactoringOptions options, GetRefactoringConsumer consumer);
 
   /**
    * Remove the given listener from the list of listeners that will receive notification when new
      * analysis results become available.
    *
    * @param listener the listener to be removed
    */
   public void removeAnalysisServerListener(AnalysisServerListener listener);
 
   /**
@@ skipping 93 matching lines @@
 
   /**
    * Start the analysis server.
    *
    * @param millisToRestart the number of milliseconds to wait for an unresponsive server before
    *          restarting it, or zero if the server should not be restarted.
    */
   public void start(long millisToRestart) throws Exception;
 
 }