anchor.diff:  
   %%
   %%
  -http_request_log(#http{is = eof, http = {response, _}, state = #fsm{queue = Q}} = Http) ->
  +http_request_log(#http{is = eof, http = {response, _}, state = #fsm{queue = Q} = State} = Http) ->
      #req{
         http = {_, {Mthd,  Url, HeadA}}, 
         code = {_, {Code, _Msg, HeadB}}, 
  
positive.code: %%
  %%
  -record(fsm, {
     socket = undefined :: #socket{}       %% http i/o streams
    ,queue  = undefined :: datum:q()       %% queue of in-flight request
    ,trace  = undefined :: pid()        %% knet stats function
  }).
  
  
negative.code:    {ok, 'IDLE', 
        #fsm{
           socket  = gen_http_socket(Opts)
          ,queue   = q:new()
          ,trace   = opts:val(trace, undefined, Opts)
        }
     }.
  
  