anchor.diff:  
   %%
   %% Extract an element from a tuple, or undefined if N > tuple size
  +%%
   safe_element(N, Tuple) ->
       case catch(element(N, Tuple)) of
           {'EXIT', {badarg, _}} ->
  
positive.code:                 [{Mod, F, A} || {F, A} <- Ignore ++ lists:flatten(Callbacks)]
          end,
      AttrIgnore = lists:flatten(lists:map(F, lists:usort([M || {M, _, _} <- UnusedExports]))),
      [X || X <- UnusedExports, not(lists:member(X, AttrIgnore))].
  
  
  kf(Key, List) ->
  
negative.code:         Value ->
              Value
      end.
  
  
  %%
  