code: def _instance_to_test(self):
      return AdamWMT
  
file_path: ClassyVision/test/manual/optim_adamw_mt_test.py
imports: import unittest
  from classy_vision.optim.adamw_mt import AdamWMT
  from test.generic.optim_test_util import TestOptimizer
label_desc: Use image node_id 3 for calling the TestAdamWMTOptimizer obj's underlying member method code with example usage: obj._instance_to_test() and returns: AdamWMT