Use a more precise type for "object" in analysis server API.

pkg/analysis_server/lib/src/edit/edit_domain.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 edit.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol.dart' hide Element;
 import 'package:analysis_server/src/services/correction/assist.dart';
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
+import 'package:analysis_server/src/services/json.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart' as engine;
 import 'package:analyzer/src/generated/error.dart' as engine;
 import 'package:analyzer/src/generated/source.dart';
 
 
 /**
@@ skipping 133 matching lines @@
  */
 class _RefactoringManager {
   final AnalysisServer server;
   final SearchEngine searchEngine;
 
   RefactoringKind kind;
   String file;
   int offset;
   int length;
   Refactoring refactoring;
-  Object feedback;
+  HasToJson feedback;
   RefactoringStatus initStatus;
   RefactoringStatus optionsStatus;
   RefactoringStatus finalStatus;
 
   String requestId;
   EditGetRefactoringResult result;
 
   _RefactoringManager(this.server, this.searchEngine) {
     _reset();
   }
@@ skipping 11 matching lines @@
     // process the request
     var params = new EditGetRefactoringParams.fromRequest(request);
     _init(params.kind, params.file, params.offset, params.length).then((_) {
       if (_hasFatalError) {
         return _sendResultResponse();
       }
       // set options
       if (params.options == null) {
         return _sendResultResponse();
       }
-      optionsStatus = _setOptions(params.options);
+      optionsStatus = _setOptions(params, request);
       if (_hasFatalError) {
         return _sendResultResponse();
       }
       // done if just validation
       if (params.validateOnly) {
         return _sendResultResponse();
       }
       // validation and create change
       refactoring.checkFinalConditions().then((_finalStatus) {
         finalStatus = _finalStatus;
@@ skipping 66 matching lines @@
 
   void _reset() {
     refactoring = null;
     feedback = null;
     initStatus = new RefactoringStatus();
     optionsStatus = new RefactoringStatus();
     finalStatus = new RefactoringStatus();
   }
 
   void _sendResultResponse() {
-    result.feedback = feedback;
+    result.feedback = feedback.toJson();
     // set problems
     {
       RefactoringStatus status = new RefactoringStatus();
       status.addStatus(initStatus);
       status.addStatus(optionsStatus);
       status.addStatus(finalStatus);
       result.problems = status.problems;
     }
     // send the response
     server.sendResponse(result.toResponse(requestId));
     // done with this request
     requestId = null;
     result = null;
   }
 
-  RefactoringStatus _setOptions(Object options) {
+  RefactoringStatus _setOptions(EditGetRefactoringParams params,
+                                Request request) {
     if (refactoring is ExtractLocalRefactoring) {
       ExtractLocalRefactoring extractRefactoring = refactoring;
-      ExtractLocalVariableOptions extractOptions = options;
+      ExtractLocalVariableOptions extractOptions =
+          new ExtractLocalVariableOptions.fromRefactoringParams(params, request);
       extractRefactoring.name = extractOptions.name;
       extractRefactoring.extractAll = extractOptions.extractAll;
       return extractRefactoring.checkName();
     }
     if (refactoring is RenameRefactoring) {
       RenameRefactoring renameRefactoring = refactoring;
-      RenameOptions renameOptions = options;
+      RenameOptions renameOptions =
+          new RenameOptions.fromRefactoringParams(params, request);
       renameRefactoring.newName = renameOptions.newName;
       return renameRefactoring.checkNewName();
     }
     return new RefactoringStatus();
   }
 }