def __init__(
        self,
        classifier: "CLASSIFIER_LOSS_GRADIENTS_TYPE",
        eps: int | float = 8,
    ):
        """
        Create an :class:`.AdversarialTrainerFBF` instance.

        :param classifier: Model to train adversarially.
        :param eps: Maximum perturbation that the attacker can introduce.
        """
        self._eps = eps
        super().__init__(classifier)

        Create an :class:`.AdversarialTrainerFBF` instance.

        :param classifier: Model to train adversarially.
        :param eps: Maximum perturbation that the attacker can introduce.
        
art/defences/trainer/adversarial_trainer_fbf.py