anchor.diff:  -spec list_all_children(Entry :: fslogic_worker:file()) ->
       {ok, [#child_link{}]}.
   list_all_children(Entry) ->
  -    list_all_children(Entry, 0, application:get_env(?APP_NAME, ls_chunk_size), []).
  +    {ok, ChunkSize} = application:get_env(?APP_NAME, ls_chunk_size),
  +    list_all_children(Entry, 0, ChunkSize, []).
   
   -spec list_all_children(Entry :: fslogic_worker:file(),
       Offset :: non_neg_integer(), Count :: non_neg_integer(),
  
positive.code: copy_file_contents_sfm(FromHandle, ToHandle) ->
      {ok, OpenFromHandle} = storage_file_manager:open(FromHandle, read),
      {ok, OpenToHandle} = storage_file_manager:open(ToHandle, write),
      ChunkSize = application:get_env(?APP_NAME, ?CHUNK_SIZE_ENV_KEY),
      copy_file_contents_sfm(OpenFromHandle, OpenToHandle, 0, ChunkSize).
  
  -spec copy_file_contents_sfm(HandleFrom :: storage_file_manager:handle(),
  
negative.code: copy_file_contents(SessId, From, To) ->
      {ok, FromHandle} = logical_file_manager:open(SessId, From, read),
      {ok, ToHandle} = logical_file_manager:open(SessId, To, write),
      {ok, ChunkSize} = application:get_env(?APP_NAME, ?CHUNK_SIZE_ENV_KEY),
      copy_file_contents(SessId, FromHandle, ToHandle, 0, ChunkSize).
  
  -spec copy_file_contents(session:id(), FromHandle :: logical_file_manager:handle(),
  