def METHOD_NAME(self, args, kwargs, bound):
    free_params = self.get_free_parameters(args, kwargs, bound)
    missing_args = [m for m in free_params if m not in self.kwargs]
    if missing_args:
        raise MissingConfigError(
            "{} is missing value(s):".format(self.name),
            missing_configs=missing_args,
        )