code: def test_default_config(self):
      config = self._get_valid_config()
      default_config = copy.deepcopy(config)
      # Default equispaced drop_epochs behavior
      del default_config["milestones"]
      expected_schedule = [
          0.1,
          0.1,
          0.1,
          0.01,
          0.01,
          0.01,
          0.001,
          0.001,
          0.001,
          0.0001,
          0.0001,
          0.0001,
      ]
      self._test_config_scheduler(default_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 5 for calling the TestMultiStepParamScheduler obj's underlying member method code with example usage: obj.test_default_config() without return types