code: def terminate_nodes(self, node_ids):
      if not node_ids:
          return
  
      terminate_instances_func = (
          self.ec2.meta.client.terminate_instances
      )
      stop_instances_func = self.ec2.meta.client.stop_instances
  
      # In some cases, this function stops some nodes, but terminates others.
      # Each of these requires a different EC2 API call. So, we use the
      # "nodes_to_terminate" dict below to keep track of exactly which API
      # call will be used to stop/terminate which set of nodes. The key is
      # the function to use, and the value is the list of nodes to terminate
      # with that function.
      nodes_to_terminate = {
          terminate_instances_func: [],
          stop_instances_func: [],
      }
  
      if self.cache_stopped_nodes:
          spot_ids = []
          on_demand_ids = []
  
          for node_id in node_ids:
              if self._get_cached_node(
                  node_id
              ).spot_instance_request_id:
                  spot_ids += [node_id]
              else:
                  on_demand_ids += [node_id]
  
          if on_demand_ids:
              # todo: show node names?
              cli_logger.print(
                  "Stopping instances {} "
                  + cf.dimmed(
                      "(to terminate instead, "
                      "set `cache_stopped_nodes: False` "
                      "under `provider` in the cluster configuration)"
                  ),
                  cli_logger.render_list(on_demand_ids),
              )
  
          if spot_ids:
              cli_logger.print(
                  "Terminating instances {} "
                  + cf.dimmed(
                      "(cannot stop spot instances, only terminate)"
                  ),
                  cli_logger.render_list(spot_ids),
              )
  
          nodes_to_terminate[stop_instances_func] = on_demand_ids
          nodes_to_terminate[terminate_instances_func] = spot_ids
      else:
          nodes_to_terminate[terminate_instances_func] = node_ids
  
      max_terminate_nodes = (
          self.max_terminate_nodes
          if self.max_terminate_nodes is not None
          else len(node_ids)
      )
  
      for terminate_func, nodes in nodes_to_terminate.items():
          for start in range(0, len(nodes), max_terminate_nodes):
              terminate_func(
                  InstanceIds=nodes[start : start + max_terminate_nodes]
              )
  
imports: import copy
  import logging
  import sys
  import threading
  import time
  from collections import OrderedDict, defaultdict
  from typing import Any, Dict, List
  import botocore
  from boto3.resources.base import ServiceResource
  import ray
  import ray._private.ray_constants
  from ray.autoscaler._private.aws.cloudwatch.cloudwatch_helper import CLOUDWATCH_AGENT_INSTALLED_AMI_TAG, CLOUDWATCH_AGENT_INSTALLED_TAG, CloudwatchHelper
  from ray.autoscaler._private.aws.config import bootstrap_aws
  from ray.autoscaler._private.aws.utils import boto_exception_handler, client_cache, resource_cache
  from ray.autoscaler._private.cli_logger import cf, cli_logger
  from ray.autoscaler._private.constants import BOTO_CREATE_MAX_RETRIES, BOTO_MAX_RETRIES
  from ray.autoscaler._private.log_timer import LogTimer
  from ray.autoscaler.node_launch_exception import NodeLaunchException
  from ray.autoscaler.node_provider import NodeProvider
  from ray.autoscaler.tags import TAG_RAY_CLUSTER_NAME, TAG_RAY_LAUNCH_CONFIG, TAG_RAY_NODE_KIND, TAG_RAY_NODE_NAME, TAG_RAY_USER_NODE_TYPE
label_desc: Use image node_id 16 for calling the AWSNodeProvider obj's underlying member method code with example usage: obj.terminate_nodes(node_ids) without return types