anchor.diff:   
   rename_var_1(File, FA, VarFilter, NewVarName, SearchPaths) ->
       FAs= get_fun_arity(File, FA),
  -    io:format("FAs:~p\n", [FAs]),
       [{refactoring, rename_var, 
         [File, {F, A}, V, new_name_gen(File, {F, A}, V, NewVarName), 
          SearchPaths, ?context]}
  
positive.code: get_vars(File, FunName, Arity, Range={range, _,_}) ->
      [Range];
  get_vars(File, FunName, Arity, VarFilter) ->
      io:format("getvars:~p\n", [{File, FunName, Arity, VarFilter}]),
      ModName=list_to_atom(filename:basename(File, ".erl")),
      FunDef=api_refac:mfa_to_fun_def(File, {ModName, FunName, Arity}),
      case FunDef of 
  
negative.code:     lists:append(CmdLists);
  rename_var(ModOrFile, FA, OldVarName, NewVarName, true, SearchPaths) ->
      File=gen_file_names(ModOrFile, true, SearchPaths),
      case File of
          [] -> 
              [];
  