code: def test_with_optimizer(self):
      optimizer = mock.Mock()
      optimizer.x = 0
      extension = extensions.InverseShift(
          "x",
          self.gamma,
          self.power,
          init=self.init,
          target=self.target,
          optimizer=optimizer,
      )
      self._run_trainer(extension, self.expect, optimizer)
  
file_path: chainer/tests/chainer_tests/training_tests/extensions_tests/test_inverse_shift.py
imports: import unittest
  import mock
  from chainer import testing
  from chainer.training import extensions
  from chainer.training import util
label_desc: Use image node_id 5 for calling the TestInverseShift obj's underlying member method code with example usage: obj.test_with_optimizer() without return types