docstr: replace {instance_id}, {region}, {cluster_name}
  variable occurrences in Unified Cloudwatch Agent config file
docstr_tok: ["replace","{","instance_id","}",",","{","region","}",",","{","cluster_name","}","variable","occurrences","in","Unified","Cloudwatch","Agent","config","file"]
code: def _replace_cwa_config_vars(
      self, config_type: str
  ) -> Dict[str, Any]:
      """
      replace {instance_id}, {region}, {cluster_name}
      variable occurrences in Unified Cloudwatch Agent config file
      """
      cwa_config = self._load_config_file(config_type)
      self._replace_all_config_variables(
          cwa_config,
          self.node_id,
          self.cluster_name,
          self.provider_config["region"],
      )
      return cwa_config
  
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 23 for calling the CloudwatchHelper obj's underlying member method code with example usage: obj._replace_cwa_config_vars(config_type) and returns: cwa_config