class_docstr: Mock of the PyTorch module.
class_docstr_tok: ["Mock","of","the","PyTorch","module","."]
code: def randperm(X):
      return np.random.choice(range(X), size=X, replace=False)
  
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 fake_torch obj's underlying member method code with example usage: obj.randperm(X) and returns: np