anchor.diff:        'currentPage',
         {
           'id': page.id,
  -        if (page.embedded != null) 'embedded': page.embedded,
  +        'embedded': page.embedded,
         },
       );
     }
  
positive.code:   /// This is called once, sometime after the `DevToolsServerConnection`
    /// instance is created.
    void initFrameworkController() {
      assert(frameworkController != null);
  
      frameworkController.onConnected.listen((vmServiceUri) {
        _notifyConnected(vmServiceUri);
      });
  
negative.code: 
        if (request.containsKey('method')) {
          final String method = request['method'];
          final Map<String, dynamic> params = request['params'] ?? {};
          _handleMethod(method, params);
        } else if (request.containsKey('id')) {
          _handleResponse(request['id']!, request['result']);
        } else {
          print('Unable to parse API message from server:\n\n$msg');
        }
  