anchor.diff:  -include_lib("radius/include/radius.hrl").
   -include("ocs_log.hrl").
   
  +%% support deprecated_time_unit()
  +-define(MILLISECOND, milli_seconds).
  +%-define(MILLISECOND, millisecond).
  +
   -spec content_types_accepted() -> ContentTypes
   	when
   		ContentTypes :: list().
  
positive.code: 
  %% @hidden
  get_auth_query([] = _Query, Filters) ->
  	{ok, _MaxItems} = application:get_env(ocs, rest_page_size),
  	case ocs_log:auth_query(1, 1, '_', '_', '_', '_') of
  		[] ->
  			{error, 404};
  		Events ->
  			JsonObj = usage_aaa_auth(Events, Filters),
  			JsonArray = {array, JsonObj},
  			Body = mochijson:encode(JsonArray),
  			N = integer_to_list(length(Events)),
  			ContentRange = "items 1-" ++ N ++ "/" ++ N,
  			Headers = [{content_type, "application/json"},
  					{content_range, ContentRange}],
  
negative.code: %% 	`GET /usageManagement/v1/usage/{id}'
  %% 	requests.
  get_usage("auth-" ++ _ = Id, [] = _Query) ->
  	{ok, MaxItems} = application:get_env(ocs, rest_page_size),
  	["auth", TimeStamp, Serial] = string:tokens(Id, [$-]),
  	TS = list_to_integer(TimeStamp),
  	N = list_to_integer(Serial),
  	case query_auth(TS, TS, '_', '_', '_', '_', MaxItems) of
  		{error, _} ->
  			{error, 500};
  		{_, Events} ->
  			case lists:keyfind(N, 2, Events) of
  				Event when is_tuple(Event) ->
  					JsonObj = usage_aaa_auth(Event, []),
  					Body = mochijson:encode(JsonObj),
  					Headers = [{content_type, "application/json"}],
  					{ok, Headers, Body};
  				_ ->
  					{error, 404}
  			end
  	end;
  get_usage("acct-" ++ _ = Id, [] = _Query) ->
  	{ok, MaxItems} = application:get_env(ocs, rest_page_size),
  	["acct", TimeStamp, Serial] = string:tokens(Id, [$-]),
  	TS = list_to_integer(TimeStamp),
  	N = list_to_integer(Serial),
  	case query_acct(TS, TS, '_', '_', '_', MaxItems) of
  		{error, _} ->
  			{error, 500};
  		{_, Events} ->
  			case lists:keyfind(N, 2, Events) of
  				Event when is_tuple(Event) ->
  					JsonObj = usage_aaa_acct(Event, []),
  					Body = mochijson:encode(JsonObj),
  					Headers = [{content_type, "application/json"}],
  					{ok, Headers, Body};
  				_ ->
  					{error, 404}
  			end
  	end;
  get_usage(Id, [] = _Query) ->
  erlang:display({?MODULE, ?LINE, Id, _Query}),
  