class_docstr: Mock BackendEngine that implements nothing, to test base class.
class_docstr_tok: ["Mock","BackendEngine","that","implements","nothing",",","to","test","base","class","."]
code: def get_optimizer(self, optimizer, model):  # noqa: D102
      pass
  
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 4 for calling the RemoveAll obj's underlying member method code with example usage: obj.get_optimizer(optimizer, model) without return types