code: def main(bucket):
      ray.init(address="auto")
  
      num_samples = 16
      results_per_second = (
          5 / 60
      )  # 5 results per minute = 1 every 12 seconds
      trial_length_s = 300
  
      max_runtime = 750
  
      timed_tune_run(
          name="durable multi-file checkpoints",
          num_samples=num_samples,
          results_per_second=results_per_second,
          trial_length_s=trial_length_s,
          max_runtime=max_runtime,
          checkpoint_freq_s=12,  # Once every 12 seconds (once per result)
          checkpoint_size_b=int(1 * 1000**2),  # 1 MB
          checkpoint_num_files=16,
          keep_checkpoints_num=2,
          resources_per_trial={"cpu": 2},
          storage_path=bucket,
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: main(bucket) without return types