class_docstr: Mock train_step only, then we can still perform Backend inits.
class_docstr_tok: ["Mock","train_step","only",",","then","we","can","still","perform","Backend","inits","."]
code: def train_step(self, X, Y, Z):  # noqa: D102
      return (0, 0)
  
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 1 for calling the RemoveTrainStepTensorflow obj's underlying member method code with example usage: obj.train_step(X, Y, Z) and returns: int,  int