anchor.diff:      try apply(Mod, Fun, Args)
       catch
    	throw:Error -> 
  -  	    Error;
  -	  _E1:_E2->
  +  	    Error;    %% wrangler always throws Error in the format of '{error, string()}';
  +	  E1:E2->
  +	    refac_io:format("E1E2:\n~p\n", [{E1, E2}]),
   	    {error, Msg}
       end.
   
  
positive.code:     try_refactoring(refac_new_fun, fun_extraction, [FileName, Start, End, FunName, TabWidth]).
  
  %%@private
  -spec(fun_extraction_eclipse/5::(filename(), pos(), pos(), string(), integer()) ->
  	      {error, string()} | {ok, [{filename(), filename(), string()}]}).
  fun_extraction_eclipse(FileName, Start, End, FunName, TabWidth) -> 
      try_refactoring(refac_new_fun, fun_extraction_eclipse, [FileName, Start, End, FunName, TabWidth]).
  
  %% =====================================================================================================
  %%@doc Unfold a function application to an instance of the function's body.
  
negative.code: 	 duplicated_code_in_buffer/4,
  	 duplicated_code_in_dirs/4,
  	 identical_expression_search/4,
  	 similar_expression_search/6, fun_extraction/5, fun_extraction_1/7,
  	 fold_expr/1, fold_expr_by_loc/5, fold_expr_by_name/7,
  	 instrument_prog/3, similar_code_detection_in_buffer/6,
  	 similar_code_detection/6, uninstrument_prog/3,
  