code: def test_fp16_two_pass_algo(self):
      self.verify_group_norm(cuda_group_norm_nhwc_two_pass, act="")
  
imports: import torch
  import unittest
label_desc: Use image node_id 4 for calling the GroupNormTest obj's underlying member method code with example usage: obj.test_fp16_two_pass_algo() without return types