code: def setUp(self):
      self.mmf_grads = []
      self.lightning_grads = []
      self.grad_clip_magnitude = 0.15
  
file_path: mmf/tests/trainers/lightning/test_grad_clipping.py
imports: import unittest
  from unittest.mock import MagicMock, patch
  import torch
  from mmf.utils.general import clip_gradients
  from pytorch_lightning.callbacks.base import Callback
  from tests.trainers.test_utils import get_config_with_defaults, get_lightning_trainer, get_mmf_trainer
label_desc: Use image node_id 1 for calling the TestLightningTrainerGradClipping obj's underlying member method code with example usage: obj.setUp() without return types