anchor.diff:  %% Updates file's size if it has changed since last import.
   %% @end
   %%--------------------------------------------------------------------
  +-spec maybe_update_file_location(#statbuf{}, file_ctx:ctx(), file_meta:type(), storage_file_ctx:ctx()) ->
  +    updated | not_updated.
   maybe_update_file_location(#statbuf{}, _FileCtx, ?DIRECTORY_TYPE, _StorageFileCtx) ->
       not_updated;
   maybe_update_file_location(#statbuf{st_mtime = StMtime, st_size = StSize},
  
positive.code:                 throw:?ENOENT ->
                      not_updated;
                  throw:?ENODATA ->
                      ok
              end
      end.
  
  
negative.code:         %todo VFS-4847 refactor this case, use when wherever possible
          {false, undefined, _} ->
              % remote file created on storage by open and not yet replicated
              not_updated;
  
          {true, undefined, undefined} when MTime < StMtime ->
              % file created locally and modified on storage
  