anchor.diff:  		undefined ->
   			<<>>;
   		US ->
  -			list_to_binary(US)
  +			US
   	end,
   	Sess = case I#ipdr_wlan.acctSessionId of
   		undefined ->
  
positive.code: 		IPDRWlan :: #ipdr_wlan{}.
  %% @doc CODEC for IPDR Wlan
  ipdr_wlan(Protocol, TimeStamp, ReqType, Req, Res, Rated) ->
  	ipdr_wlan1(record_info(fields, ipdr_wlan), Protocol, TimeStamp,
  			ReqType, Req, Res, Rated, #ipdr_wlan{}).
  %% @hidden
  
negative.code: 
  %% @hidden
  ipdr_csv(Log, IoDevice, {Cont, [#ipdrDocWLAN{} | T]}) ->
  	Header = [<<"Creation Time;Sequence Number;Username;Subscriber ID;">>,
  			<<"Accounting Session ID;User IP Address;Calling Station ID;">>,
  			<<"Called Station ID;NAS IP Address;NAS Identifier;">>,
  			<<"Class;Session Terminate Cause;Session Duration;">>,
  