code: def test_lr_attribute_is_updated(self, setter, net_optim_dummy):
      new_lr = net_optim_dummy.lr + 1
      setter(net_optim_dummy, "lr", new_lr)
  
      assert net_optim_dummy.lr == new_lr
  
file_path: skorch/skorch/tests/test_setter.py
imports: from unittest.mock import Mock
  import pytest
label_desc: Use image node_id 5 for calling the TestOptimizerSetter obj's underlying member method code with example usage: obj.test_lr_attribute_is_updated(setter, net_optim_dummy) without return types