anchor.diff:  make_export_attr(LineNo) ->
       {{attribute, LineNo, export, [
   				  {validate,          1},
  -				  {extract,             2},
  +				  {extract,           2},
   				  {get_partition_key, 2}
   				 ]}, LineNo + 1}.
   
  -%%-ifdef(TEST).
  +-ifdef(TEST).
   -compile(export_all).
   
   -define(VALID,   true).
  
positive.code:     Expected = {2, {3, "something", pong}, {2, 3, pang}},
      ?_assertEqual(Expected, Result).
  
  %%-endif.
  
negative.code:     Fun = make_fun(FunName, 1, [ClauseS, ClauseF], LineNo2),
      {[Fun], LineNo2, Maps, FunNo + 1}.
  
  -spec make_fun(atom(), pos_integer(), ast(), pos_integer()) -> expr().
  make_fun(FunName, Arity, Clause, LineNo) ->
      {function, LineNo, FunName, Arity, Clause}.
  
  