anchor.diff:  op_color(iterate_first_next) -> ?ATC_ITERATING;
   op_color(iterate_fold) -> ?ATC_ITERATING;
   op_color(iterate_foldl) -> ?ATC_ITERATING;
  +op_color(iterate_fold_map) -> ?ATC_ITERATING;
   op_color(iterate_list_comp) -> ?ATC_ITERATING;
   op_color(iterate_map) -> ?ATC_ITERATING;
   op_color(iterate_select) -> ?ATC_ITERATING;
  
positive.code: 			{fetch, SetupFunc, fun ?MODULE:dict_fetch/1},
  			{iterate_map, SetupFunc, fun ?MODULE:dict_iterate_map/1},
  			{iterate_fold, SetupFunc, fun ?MODULE:dict_iterate_fold/1},
  			{to_list, SetupFunc, fun ?MODULE:dict_to_list/1},
  			{to_list_fold, SetupFunc, fun ?MODULE:dict_to_list_fold/1},
  			{store, SetupFunc, fun ?MODULE:dict_store/1},
  
negative.code: dict_iterate_fold({_Size, Dict}) ->
  	dict:fold(fun(_Key, Value, _) -> null(Value) end, ok, Dict).
  
  dict_iterate_fold_map({_Size, Dict}) ->
  	dict:fold(fun(Key, Value, NewDict) -> dict:store(Key, Value, NewDict) end, dict:new(), Dict).
  
  dict_to_list({_Size, Dict}) ->
  	dict:to_list(Dict).
  
  