code: def get_head_node_ip(cluster_config: Union[dict, str]) -> str:
      """Returns head node IP for given configuration file if exists.
  
      Args:
          cluster_config (Union[str, dict]): Either the config dict of the
              cluster, or a path pointing to a file containing the config.
  
      Returns:
          The ip address of the cluster head node.
  
      Raises:
          RuntimeError if the cluster is not found.
      """
      with _as_config_file(cluster_config) as config_file:
          return commands.get_head_node_ip(config_file)
  
imports: import json
  import os
  import tempfile
  from contextlib import contextmanager
  from typing import Any, Callable, Dict, Iterator, List, Optional, Union
  from ray.autoscaler._private import commands
  from ray.autoscaler._private.cli_logger import cli_logger
  from ray.autoscaler._private.event_system import CreateClusterEvent
  from ray.autoscaler._private.event_system import global_event_system
  from ray.util.annotations import DeveloperAPI
label_desc: Use image node_id 5 for calling a global function with example usage: get_head_node_ip(cluster_config) and returns: commands