anchor.diff:      ?FORALL({SpecialWords}, {special_words()},
   	    begin
   	      Decoded =
  -		  special_words_pb:decode_message(special_words_pb:encode_message(SpecialWords)),
  +		  special_words_pb:decode_message(iolist_to_binary(special_words_pb:encode_message(SpecialWords))),
   	      compare_messages(SpecialWords, Decoded)
   	    end).
   
  
positive.code:     ?FORALL(Repeater, (repeater_person()),
  	    begin
  	      Decoded =
  		  repeater_pb:decode_person(repeater_pb:encode_person(Repeater)),
  	      compare_messages(Repeater, Decoded)
  	    end).
  
  
negative.code: 	      {ok, Encodable} = extend_pb:set_extension(Input, baz,
  							Extend),
  	      Decoded =
  		  extend_pb:decode_extendable(iolist_to_binary(extend_pb:encode_extendable(Encodable))),
  	      Out = extend_pb:get_extension(Decoded, baz),
  	      compare({ok, Extend}, Out)
  	    end).
  