code: def test_delete_multi_app(ray_start_stop, url):
      py_module = (
          "https://github.com/ray-project/test_module/archive/"
          "aa6f366f7daa78c98408c27d917a983caa9f888b.zip"
      )
      config = {
          "applications": [
              {
                  "name": "app1",
                  "route_prefix": "/app1",
                  "import_path": "dir.subdir.a.add_and_sub.serve_dag",
                  "runtime_env": {
                      "working_dir": (
                          "https://github.com/ray-project/test_dag/archive/"
                          "78b4a5da38796123d9f9ffff59bab2792a043e95.zip"
                      )
                  },
                  "deployments": [
                      {
                          "name": "Subtract",
                          "ray_actor_options": {
                              "runtime_env": {"py_modules": [py_module]}
                          },
                      }
                  ],
              },
              {
                  "name": "app2",
                  "route_prefix": "/app2",
                  "import_path": "ray.serve.tests.test_config_files.world.DagNode",
              },
          ],
      }
  
      # Ensure the REST API is idempotent
      num_iterations = 2
      for iteration in range(1, num_iterations + 1):
          print(
              f"*** Starting Iteration {iteration}/{num_iterations} ***\n"
          )
  
          print("Sending PUT request for config.")
          deploy_config_multi_app(config, url)
          wait_for_condition(
              lambda: requests.post(
                  "http://localhost:8000/app1", json=["ADD", 1]
              ).text
              == "2",
              timeout=15,
          )
          wait_for_condition(
              lambda: requests.post(
                  "http://localhost:8000/app1", json=["SUB", 1]
              ).text
              == "-1",
              timeout=15,
          )
          wait_for_condition(
              lambda: requests.post("http://localhost:8000/app2").text
              == "wonderful world",
              timeout=15,
          )
          print("Deployments are live and reachable over HTTP.\n")
  
          print("Sending DELETE request for config.")
          delete_response = requests.delete(url, timeout=15)
          assert delete_response.status_code == 200
          print("DELETE request sent successfully.")
  
          wait_for_condition(
              lambda: len(
                  list_actors(
                      filters=[
                          ("ray_namespace", "=", SERVE_NAMESPACE),
                          ("state", "=", "ALIVE"),
                      ]
                  )
              )
              == 0
          )
  
          with pytest.raises(requests.exceptions.ConnectionError):
              requests.post(
                  "http://localhost:8000/app1", json=["ADD", 1]
              ).raise_for_status()
          with pytest.raises(requests.exceptions.ConnectionError):
              requests.post(
                  "http://localhost:8000/app2"
              ).raise_for_status()
          print(
              "Deployments have been deleted and are not reachable.\n"
          )
  
imports: import copy
  import grpc
  import re
  import os
  import sys
  from typing import Dict
  import pytest
  import requests
  import ray
  from ray import serve
  from ray._private.test_utils import wait_for_condition
  import ray._private.ray_constants
  from ray.util.state import list_actors
  from ray.serve._private.constants import SERVE_NAMESPACE
  from ray.serve.tests.conftest import *
  from ray.tests.conftest import *
  from ray._private.test_utils import generate_system_config_map
  from ray.serve.schema import ServeInstanceDetails, HTTPOptionsSchema
  from ray.serve._private.common import ApplicationStatus, DeploymentStatus, DeploymentStatusTrigger, ReplicaState, ProxyStatus
  from ray.serve.generated import serve_pb2, serve_pb2_grpc
label_desc: Use image node_id 6 for calling a global function with example usage: test_delete_multi_app(ray_start_stop, url) without return types