anchor.diff:          {<<"type">>, <<"dir">>},
           {<<"permissions">>, 0},
           {<<"modificationTime">>, 0},
  -        {<<"size">>, 0},
  +        {<<"size">>, null},
           {<<"totalChildrenCount">>, 1},
           {<<"parent">>, null},
           {<<"children">>, [op_gui_utils:ids_to_association(ShareId, FileId)]},
  
positive.code:                         true ->
                              fetch_dir_children(FileId, ChildrenLimit)
                      end,
                      {<<"dir">>, 0, ChildrenList, TotalCount};
                  _ ->
                      {<<"file">>, SizeAttr, [], 0}
              end,
  
negative.code:         {<<"type">>, <<"dir">>},
          {<<"permissions">>, 0},
          {<<"modificationTime">>, 0},
          {<<"size">>, null},
          {<<"totalChildrenCount">>, 1},
          {<<"parent">>, null},
          {<<"children">>, [op_gui_utils:ids_to_association(ShareId, RootFile)]},
  