anchor.diff:  %% @doc Deletes the store and all files within it.
   %% @end
   %%--------------------------------------------------------------------
  -
  +-spec delete(estore()) -> ok.
   delete(EStore = #estore{dir = Dir}) ->
       close(EStore),
       Files = files(EStore),
  
positive.code: %% in there.
  %% @end
  %%--------------------------------------------------------------------
  delete(Before, EStore = #estore{size = Size}) ->
      EStore1 = close_file(EStore),
      %% We substract the Size from Before so we can make sure that we
      %% can guarantee everything after Before is still there.
  
negative.code: %%   as {@link eid/1} with the argument estore.
  %% @end
  %%--------------------------------------------------------------------
  -spec eid() -> <<_:32>>.
  eid() ->
      eid(estore).
  
  