anchor.diff:  	Request1 = {HostUrl ++ "/usageManagement/v1/usage?type=AAAAccessUsage", RequestHeaders1},
   	{ok, Result1} = httpc:request(get, Request1, [], []),
   	{{"HTTP/1.1", 200, _OK}, ResponseHeaders1, Body1} = Result1,
  +	{_, AcceptRanges1} = lists:keyfind("accept-ranges", 1, ResponseHeaders1),
  +	true = lists:member("items", string:tokens(AcceptRanges1, ", ")),
   	{_, Range1} = lists:keyfind("content-range", 1, ResponseHeaders1),
   	["items", "1", RangeEndS1, "*"] = string:tokens(Range1, " -/"),
   	PageSize = list_to_integer(RangeEndS1),
  
positive.code: 				Request2 = {HostUrl ++ "/usageManagement/v1/usage?type=AAAAccountingUsage", RequestHeaders2},
  				{ok, Result2} = httpc:request(get, Request2, [], []),
  				{{"HTTP/1.1", 200, _OK}, ResponseHeaders2, Body2} = Result2,
  				{_, Range} = lists:keyfind("content-range", 1, ResponseHeaders2),
  				["items", RangeStartS, RangeEndS, EndS] = string:tokens(Range, " -/"),
  				RangeStart2 = list_to_integer(RangeStartS),
  
negative.code: 	Request1 = {HostUrl ++ "/ocs/v1/subscriber", RequestHeaders1},
  	{ok, Result1} = httpc:request(get, Request1, [], []),
  	{{"HTTP/1.1", 200, _OK}, ResponseHeaders1, Body1} = Result1,
  	{_, AcceptRanges1} = lists:keyfind("accept-ranges", 1, ResponseHeaders1),
  	true = lists:member("items", string:tokens(AcceptRanges1, ", ")),
  	{_, Range1} = lists:keyfind("content-range", 1, ResponseHeaders1),
  	["items", "1", RangeEndS1, "*"] = string:tokens(Range1, " -/"),
  	PageSize = list_to_integer(RangeEndS1),
  