anchor.diff:  	profiling = false,
   	pattern   = {'_','_','_'},
   	rootset   = [],
  +	fd    = undefined,
   	start_ts  = undefined,
   	reply     = undefined,
   	bpd       = #bpd{}
  
positive.code: 		    rootset   = Rootset,
  		    start_ts  = T0,
  		    reply     = From,
  		    pattern   = Pattern
  		}};
  	false ->
  	    {reply, error, #state{}}
      end;
  
  handle_call(stop_profiling, _From, #state{ profiling = false } = S) ->
  
negative.code: 	rootset   = [],
  	pattern   = {'_','_','_'},
  	bpd       = Bpd
      }}.
  
  %% -------------------------------------------------------------------- %%
  %%
  