code: def setUpClass(cls):
      trainer_lib_test.TrainerLibTest.setUpClass()
  
file_path: tensor2tensor/tensor2tensor/bin/t2t_trainer_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.bin import t2t_trainer
  from tensor2tensor.utils import trainer_lib_test
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the TrainerTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types