code: protected static <Message extends PMessage<Message, CField>>
      String asString(Message message) {
          ByteArrayOutputStream baos = new ByteArrayOutputStream();
          PRETTY_SERIALIZER.serialize(baos, message);
          return new String(baos.toByteArray(), UTF_8);
      }
docs: Prints a jsonCompact string representation of the message.
  
  @param message The message to stringify.
  @param <Message> The contained message type.
  @return The resulting string.