anchor.diff:      Offset selectionMidpoint,
       List<TextSelectionPoint> endpoints,
       TextSelectionDelegate delegate,
  -    ValueNotifier<ClipboardStatus>? clipboardStatus,
  +    ValueListenable<ClipboardStatus>? clipboardStatus,
       Offset? lastSecondaryTapDownPosition,
     ) {
       return _TextSelectionControlsToolbar(
  
positive.code:     required this.textLineHeight,
    }) : super(key: key);
  
    final ValueNotifier<ClipboardStatus> clipboardStatus;
    final TextSelectionDelegate delegate;
    final List<TextSelectionPoint> endpoints;
    final Rect globalEditableRegion;
  
negative.code: // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  import 'package:flutter/foundation.dart';
  import 'package:flutter/material.dart' hide Stack;
  import 'package:flutter/rendering.dart';
  import 'package:provider/provider.dart';
  