anchor.diff:  
     const CodeSizeSnapshotTable._(
       this.rootNode,
  +    this.autoExpandRoot,
       this.treeColumn,
       this.sortColumn,
       this.columns,
  
positive.code:   //                  if the table is only showing negative values.
    @override
    Widget build(BuildContext context) {
      return TreeTable<TreemapNode>(
        dataRoots: rootNode.children,
        columns: columns,
        treeColumn: treeColumn,
        keyFactory: (node) => PageStorageKey<String>(node.name),
  
negative.code: import '../utils.dart';
  
  class CodeSizeSnapshotTable extends StatelessWidget {
    factory CodeSizeSnapshotTable({@required rootNode, autoExpandRoot = true}) {
      final treeColumn = _NameColumn(currentRootLevel: rootNode.level);
      final sizeColumn = _SizeColumn();
      final columns = List<ColumnData<TreemapNode>>.unmodifiable([
  