code: def test_atan2_matches_widest(self):
      fns = [lambda x, y: torch.atan2(x, y), lambda x, y: x.atan2(y)]
      self.run_binary_promote_test(fns, (self.b,))
  
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 4 for calling the TestPromotion obj's underlying member method code with example usage: obj.test_atan2_matches_widest() without return types