code: def gen_cpu_optimizer_flag(self, test_config, is_baseline):
      if (
          "cpu_optimizer" in test_config
          and test_config["cpu_optimizer"]
      ):
          cpu_optimizer_flag = "--cpu-optimizer"
          if is_baseline:
              cpu_optimizer_flag += " --cpu_torch_adam"
              return cpu_optimizer_flag
          if (
              "test_torch_offload" in test_config
              and test_config["test_torch_offload"]
          ):
              cpu_optimizer_flag += " --cpu_torch_adam"
              return cpu_optimizer_flag
      else:
          cpu_optimizer_flag = ""
  
      return cpu_optimizer_flag
  
imports: import unittest
  import os
  import re
  from .test_common import BaseTestCase
label_desc: Use image node_id 27 for calling the GPT2FuncTestCase obj's underlying member method code with example usage: obj.gen_cpu_optimizer_flag(test_config, is_baseline) and returns: cpu_optimizer_flag, cpu_optimizer_flag, cpu_optimizer_flag