code: def test_build_cosine_scheduler(self):
      config = self._get_valid_decay_config()
      scheduler = build_param_scheduler(config)
      self.assertTrue(isinstance(scheduler, CosineParamScheduler))
  
file_path: ClassyVision/test/optim_param_scheduler_cosine_test.py
imports: import copy
  import unittest
  from classy_vision.optim.param_scheduler import build_param_scheduler, CosineParamScheduler
label_desc: Use image node_id 7 for calling the TestCosineScheduler obj's underlying member method code with example usage: obj.test_build_cosine_scheduler() without return types