anchor.diff:  	 start/2,
   	 start/3,
   	 state/0,
  +	 update_handler/1,
   	 exit/0,
   	 quit_cooja/1,
   	 %% simulation
  
positive.code: 	    E
      end.
  
  state() ->
      case lists:member(cooja_server, registered()) of
  	true ->
  
negative.code: 	 simulation_time_ms/1,
  	 simulation_step_ms/1,
  	 simulation_step/2,
  	 simulation_step/3,
  	 %% radio
  	 radio_set_config/2,
  	 radio_get_config/1,
  