code: def setUp(self):
      self.handle = amp.init(enabled=True)
      common_init(self)
  
file_path: apex/tests/L0/run_amp/test_promotion.py
imports: import unittest
  import itertools
  from apex import amp
  import torch
  from torch import nn
  import torch.nn.functional
  from utils import common_init, HALF, FLOAT, DTYPES
label_desc: Use image node_id 1 for calling the TestPromotion obj's underlying member method code with example usage: obj.setUp() without return types