code: def f():
      pass
  
imports: import os
  import sys
  import time
  from collections import defaultdict
  import pytest
  import requests
  import ray
  from ray import serve
  from ray._private.test_utils import SignalActor, wait_for_condition
  from ray.cluster_utils import Cluster
  from ray.exceptions import RayActorError
  from ray.serve._private.common import DeploymentID, ReplicaState
  from ray.serve._private.constants import SERVE_NAMESPACE
  from ray.serve._private.deployment_state import ReplicaStartupStatus
  from ray.serve._private.utils import get_head_node_id
  from ray.serve.context import _get_global_client
  from ray.serve.handle import RayServeHandle
  from ray.serve.schema import ServeDeploySchema
label_desc: Use image node_id 6 for calling a global function with example usage: f() without return types