}
    }

    final Object getDefaultParameterValue(int position) {
      return arguments.get(position);
    }

    final void calledWith(Object... args) {
      for (int i = 0; i < args.length; i++) {
        if (args[i] != null) {
          arguments.put(i, args[i]);
        }
      }
      for (Object arg : args) {