code: def test_runs_in_single_mode(self):
      restarter = Restarter(
          TEST_MODE_1, self.out_dir, target_local_step=TEST_NUM_STEPS
      )
      self.assert_first_run(
          restarter,
          steps_to_go=TEST_NUM_STEPS,
          target_global_step=TEST_NUM_STEPS,
      )
  
file_path: tensor2tensor/tensor2tensor/rl/restarter_test.py
imports: import os
  from tensor2tensor.rl.restarter import Restarter
  import tensorflow.compat.v1
label_desc: Use image node_id 5 for calling the RestarterTest obj's underlying member method code with example usage: obj.test_runs_in_single_mode() without return types