code: def test_scheduler(self):
      config = self._get_valid_config()
      expected_schedule = [
          0.1,
          0.1,
          0.1,
          0.1,
          0.01,
          0.01,
          0.001,
          0.001,
          0.0001,
          0.0001,
          0.0001,
          0.0001,
      ]
      self._test_config_scheduler(config, expected_schedule)
  
file_path: ClassyVision/test/optim_param_scheduler_multi_step_test.py
imports: import copy
  import unittest
  from classy_vision.optim.param_scheduler import build_param_scheduler, MultiStepParamScheduler
label_desc: Use image node_id 4 for calling the TestMultiStepParamScheduler obj's underlying member method code with example usage: obj.test_scheduler() without return types