anchor.diff:      {ok, map()} | {error, term()}.
   file_popularity_api_get_configuration(SpaceId) ->
       file_popularity_api:get_configuration(SpaceId).
  -
  -
  --spec invalidate_luma_cache(od_storage:id()) -> ok.
  -invalidate_luma_cache(StorageId) ->
  -    luma_cache:invalidate(StorageId).
  -
  -
  --spec new_helper(helper:name(), helper:args(), helper:user_ctx(), Insecure :: boolean(),
  -    helper:storage_path_type()) -> {ok, helpers:helper()}.
  -new_helper(HelperName, Args, AdminCtx, Insecure, StoragePathType) ->
  -    helper:new_helper(HelperName, Args, AdminCtx, Insecure, StoragePathType).
  -
  -
  --spec new_luma_config(luma_config:url(), luma_config:api_key()) ->
  -    luma_config:config().
  -new_luma_config(URL, ApiKey) ->
  -    luma_config:new(URL, ApiKey).
  -
  -
  --spec verify_storage_on_all_nodes(helpers:helper()) ->
  -    ok | {error, term()} | {error, term(), Stacktrace :: list()}.
  -verify_storage_on_all_nodes(Helper) ->
  -    storage_detector:verify_storage_on_all_nodes(Helper).
  -
  -
  --spec prepare_helper_args(helper:name(), helper:args()) -> helper:args().
  -prepare_helper_args(HelperName, Params) ->
  -    helper_params:prepare_helper_args(HelperName, Params).
  -
  -
  --spec prepare_user_ctx_params(helper:name(), helper:user_ctx()) -> helper:user_ctx().
  -prepare_user_ctx_params(HelperName, Params) ->
  -    helper_params:prepare_user_ctx_params(HelperName, Params).
   
   
   -spec get_provider_id() -> {ok, od_provider:id()} | {error, term()}.
  
positive.code: %%% Exposed functions
  %%%===================================================================
  
  -spec storage_new(storage_config:name(), [storage_config:helper()], boolean(),
      undefined | luma_config:config()) -> storage_config:doc().
  storage_new(Name, Helpers, ReadOnly, LumaConfig) ->
      storage_config:new(Name, Helpers, ReadOnly, LumaConfig).
  
  
  
negative.code:     {ok, StorageIds} = space_logic:get_local_storage_ids(SpaceId),
      StorageId = hd(StorageIds),
      storage_logic:revoke_support(StorageId, SpaceId).
  
  -spec get_spaces() -> {ok, [od_space:id()]} | errors:error().
  get_spaces() ->
  