code: def setUp(self):
      self.config = OmegaConf.create(
          {"optimizer": {"type": "adam_w", "params": {"lr": 5e-5}}}
      )
  
file_path: mmf/tests/modules/test_optimizers.py
imports: import gc
  import unittest
  import torch
  from mmf.models.mmbt import MMBT
  from mmf.modules.hf_layers import undo_replace_with_jit
  from mmf.utils.build import build_optimizer
  from omegaconf import OmegaConf
  from tests.test_utils import SimpleModel, skip_if_no_network
label_desc: Use image node_id 1 for calling the TestOptimizers obj's underlying member method code with example usage: obj.setUp() without return types