code: def generator_loss(fake_output):
      return cross_entropy(tf.ones_like(fake_output), fake_output)
  
file_path: adversarial-robustness-toolbox/examples/backdoor_attack_dgm_trail.py
imports: import numpy
  import tensorflow
  from art.attacks.poisoning.backdoor_attack_dgm.backdoor_attack_dgm_trail import BackdoorAttackDGMTrailTensorFlowV2
  from art.estimators.gan.tensorflow import TensorFlowV2GAN
  from art.estimators.generation.tensorflow import TensorFlowV2Generator
  from art.estimators.classification.tensorflow import TensorFlowV2Classifier
label_desc: Use image node_id 4 for calling a global function with example usage: generator_loss(fake_output) and returns: cross_entropy