code: def _get_default_empty_config_file_hash(self):
      default_cw_config = "{}"
      parameter_value = self._sha1_hash_json(default_cw_config)
      return parameter_value
  
imports: import copy
  import hashlib
  import json
  import logging
  import os
  import time
  from enum import Enum
  from typing import Any, Callable, Dict, List, Union
  import botocore
  from ray.autoscaler._private.aws.utils import client_cache, resource_cache
  from ray.autoscaler.tags import NODE_KIND_HEAD, TAG_RAY_CLUSTER_NAME, TAG_RAY_NODE_KIND
label_desc: Use image node_id 13 for calling the CloudwatchHelper obj's underlying member method code with example usage: obj._get_default_empty_config_file_hash() and returns: parameter_value