anchor.diff:      io:format("jlrdemo_can:handle_call(start_can, ~p, ~p, ~p)~n",
   	      [Interface, Driver, OldInterface]),
       case OldInterface of
  -	undefined ->
  +	0 ->
   	    true;
   	_ ->
   	    can_sock:stop(OldInterface)
  
positive.code: -export([set_fan_speed/1]).
  
  -record(st, {
  	  iface = undefined,
  	  unknown1 = 0,
  	  air_distribution = 0,
  	  unknown2 = 0,
  
negative.code: init(_) ->
      io:format("jlrdemo_can:init()~n"),
      can_router:start(),
      {ok, #st {}}.
  
  handle_cast(_, S) ->
      {noreply, S}.
  