anchor.diff:            child: widget.children[i],
           ),
           if (i < widget.children.length - 1)
  -          GestureDetector(
  -            key: widget.dividerKey(i),
  -            behavior: HitTestBehavior.translucent,
  -            onHorizontalDragUpdate: (details) =>
  -                isHorizontal ? updateSpacing(details, i) : null,
  -            onVerticalDragUpdate: (details) =>
  -                isHorizontal ? null : updateSpacing(details, i),
  -            // DartStartBehavior.down is needed to keep the mouse pointer stuck to
  -            // the drag bar. There still appears to be a few frame lag before the
  -            // drag action triggers which is't ideal but isn't a launch blocker.
  -            dragStartBehavior: DragStartBehavior.down,
  -            child: widget.splitters != null
  -                ? widget.splitters[i]
  -                : _defaultSplitter(layoutHeight: height, layoutWidth: width),
  +          MouseRegion(
  +            cursor: SystemMouseCursors.grab,
  +            child: GestureDetector(
  +              key: widget.dividerKey(i),
  +              behavior: HitTestBehavior.translucent,
  +              onHorizontalDragUpdate: (details) =>
  +                  isHorizontal ? updateSpacing(details, i) : null,
  +              onVerticalDragUpdate: (details) =>
  +                  isHorizontal ? null : updateSpacing(details, i),
  +              // DartStartBehavior.down is needed to keep the mouse pointer stuck to
  +              // the drag bar. There still appears to be a few frame lag before the
  +              // drag action triggers which is't ideal but isn't a launch blocker.
  +              dragStartBehavior: DragStartBehavior.down,
  +              child: widget.splitters != null
  +                  ? widget.splitters[i]
  +                  : _defaultSplitter(layoutHeight: height, layoutWidth: width),
  +            ),
             ),
         ]);
       }
  
positive.code:     // The material icon for a drag handle is not currently available.
      // For now, draw an indicator that is 3 lines running in the direction
      // of the main axis, like a hamburger menu.
      // TODO(https://github.com/flutter/devtools/issues/1265): update mouse
      // to indicate that this is resizable.
      final defaultDragIndicator = Flex(
        direction: isHorizontal ? Axis.vertical : Axis.horizontal,
        mainAxisSize: MainAxisSize.min,
  
negative.code: 
  import 'package:flutter/gestures.dart';
  import 'package:flutter/material.dart';
  import 'package:flutter/rendering.dart';
  
  import '../utils.dart';
  
  