class_docstr: Mock loss class.
class_docstr_tok: ["Mock","loss","class","."]
docstr: Mock loss should be callable from train_step.
docstr_tok: ["Mock","loss","should","be","callable","from","train_step","."]
code: def __call__(self, x, y):
      """Mock loss should be callable from train_step."""
      return
  
imports: import sys
  import numpy
  from fairlearn.adversarial._adversarial_mitigation import _AdversarialFairness
  from fairlearn.adversarial._pytorch_engine import PytorchEngine
  from fairlearn.adversarial._tensorflow_engine import TensorflowEngine
  from fairlearn.adversarial._backend_engine import BackendEngine
label_desc: Use image node_id 2 for calling the loss_class obj's underlying member method code with example usage: obj.__call__(x, y) without return types