anchor.diff:      end.
   
   selective() ->
  -    false.
  +    true.
   
   %%Do the actual program transformation here.
   -spec (transform/1::(#args{}) -> 
  
positive.code: -behaviour(gen_refac).
  
  %% export of callback function.
  -export([input_pars/0, select_focus/1, 
           pre_cond_check/1, selective/0,
           transform/1]).
  
  -include("../include/gen_refac.hrl").
  
  %% Ask the user which module to import. 
  -spec (input_pars/0::() -> [string()]).                           
  input_pars()->
      ["Module name:"].
  
  %% no focus selection is needed.
  
negative.code:     {ok, none}.
      
  %% Pre-condition checking. 
  -spec (check_pre_cond/1::(#args{}) -> ok | {error, term()}).  
  check_pre_cond(Args=#args{user_inputs=[ModuleName]}) ->
      case collect_uses(Args) of 
          [] ->
              Msg =io_lib:format(
  