code: def compute_loss(self, x, y, **kwargs):
      pass
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  import unittest
  import numpy
  from art.estimators.classification.classifier import ClassGradientsMixin, ClassifierMixin
  from art.estimators.estimator import BaseEstimator, LossGradientsMixin, NeuralNetworkMixin
  from tests.utils import TestBase, master_seed
label_desc: Use image node_id 5 for calling the ClassifierNeuralNetworkInstance obj's underlying member method code with example usage: obj.compute_loss(x, y) without return types