anchor.diff:  }
   
   @pragma('vm:entry-point')
  -void _setupHooks() {  // ignore: unused_element
  +void _setupHooks() {
     assert(() {
       // In debug mode, register the schedule frame extension.
       developer.registerExtension('ext.ui.window.scheduleFrame', _scheduleFrame);
  
positive.code: int? _getCallbackHandle(Function closure) native 'GetCallbackHandle';
  Function? _getCallbackFromHandle(int handle) native 'GetCallbackFromHandle';
  
  // Required for gen_snapshot to work correctly.
  int? _isolateId; // ignore: unused_element
  
  @pragma('vm:entry-point')
  Function _getPrintClosure() => _print;
  @pragma('vm:entry-point')
  Function _getScheduleMicrotaskClosure() => _scheduleMicrotask;
  
negative.code: // Copyright 2013 The Flutter Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  // @dart = 2.12
  part of dart.ui;
  