docs: def secured_task(f):
      """
      Secured task decorator.
      """
  
      @wraps(f)
      def secured_task_decorator(*args, **kwargs):
          task_data = _get_data_from_args(args)
          assert isinstance(task_data, TaskData)
          if not verify_security_data(task_data.get_data()['security']):
              raise SecurityException(
                  task_data.get_data()['security']['hashed_token'])
  
          task_data.transform_payload(lambda x: x['data'])
          return f(*args, **kwargs)
  
      return secured_task_decorator