docstr: replace {instance_id}, {region}, {cluster_name}
  variable occurrences in cloudwatch alarm config file
docstr_tok: ["replace","{","instance_id","}",",","{","region","}",",","{","cluster_name","}","variable","occurrences","in","cloudwatch","alarm","config","file"]
code: def _replace_alarm_config_vars(self, config_type: str) -> List[str]:
      """
      replace {instance_id}, {region}, {cluster_name}
      variable occurrences in cloudwatch alarm config file
      """
      data = self._load_config_file(config_type)
      param_data = []
      for item in data:
          item_out = copy.deepcopy(item)
          self._replace_all_config_variables(
              item_out,
              self.node_id,
              self.cluster_name,
              self.provider_config["region"],
          )
          param_data.append(item_out)
      return param_data
  
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 25 for calling the CloudwatchHelper obj's underlying member method code with example usage: obj._replace_alarm_config_vars(config_type) and returns: param_data