anchor.diff:      LinkedUnitContext context,
       ClassDeclaration node,
     ) {
  -    var lazy = LazyClassDeclaration.get(node);
  +    var lazy = get(node);
       if (lazy != null && !lazy._hasDocumentationComment) {
         node.documentationComment = context.createComment(lazy.data);
         lazy._hasDocumentationComment = true;
  
positive.code:     LinkedUnitContext context,
      FormalParameter node,
    ) {
      var lazy = LazyFormalParameter.get(node);
      if (lazy != null) {
        var lazy = get(node);
        return context.getInformativeData(lazy.data)?.codeLength ?? 0;
      }
      return node.length;
  
negative.code:     LinkedUnitContext context,
      VariableDeclaration node,
    ) {
      var lazy = get(node);
      if (lazy != null) {
        return context.getInformativeData(lazy.data)?.codeOffset ?? 0;
      }
      VariableDeclarationList parent = node.parent;
  