anchor.diff:    final ColumnData<T> sortColumn;
     final SortDirection sortDirection;
     final ColumnData<T>? secondarySortColumn;
  +  final double? rowItemExtent;
     final Function(
       ColumnData<T> column,
       SortDirection direction, {
  
positive.code:                       child: ListView.builder(
                          controller: scrollController,
                          itemCount: widget.data.length,
                          itemBuilder: _buildItem,
                        ),
                      ),
  
negative.code:           secondarySortColumn: widget.secondarySortColumn,
            onSortChanged: _sortDataAndUpdate,
            activeSearchMatchNotifier: widget.activeSearchMatchNotifier,
            rowItemExtent: defaultRowHeight,
          );
        },
      );
  