code: def _set_tmpdir(self, tmpdir):
      self._tmpdir = tmpdir
  
imports: import os
  import random
  import unittest
  import socket
  import json
  from ray.autoscaler.local.coordinator_server import OnPremCoordinatorServer
  from ray.autoscaler._private.providers import _NODE_PROVIDERS, _get_node_provider
  from ray.autoscaler._private.local import config
  from ray.autoscaler._private.local.node_provider import LocalNodeProvider
  from ray.autoscaler._private.local.node_provider import record_local_head_state_if_needed
  from ray.autoscaler._private.local.coordinator_node_provider import CoordinatorSenderNodeProvider
  from ray.autoscaler.tags import TAG_RAY_NODE_KIND, TAG_RAY_CLUSTER_NAME, TAG_RAY_NODE_NAME, NODE_KIND_WORKER, NODE_KIND_HEAD, TAG_RAY_USER_NODE_TYPE, TAG_RAY_NODE_STATUS, STATUS_UP_TO_DATE
  from ray._private.utils import get_ray_temp_dir
  import pytest
label_desc: Use image node_id 5 for calling the OnPremCoordinatorServerTest obj's underlying member method code with example usage: obj._set_tmpdir(tmpdir) without return types