code: def _start_app_server(ip: str, port: int):
      try:
          import labml_app
      except (ImportError, ModuleNotFoundError):
          logger.log(
              "Cannot import ", ("labml_app", Text.highlight), "."
          )
          logger.log(
              "Install with ", ("pip install labml-app", Text.value)
          )
          return
  
      labml_app.start_server(ip=ip, port=port)
  
imports: import argparse
  import os
  import subprocess
  import sys
  import threading
  import time
  from typing import List
  from labml import logger, experiment
  from labml.experiment import generate_uuid
  from labml.internal.app import AppTracker, SimpleAppTrackDataSource
  from labml.internal.app.logs import AppConsoleLogs
  from labml.internal.app.url import AppUrlResponseHandler
  from labml.internal.lab import get_app_url_for_handle
  from labml.logger import Text
  from labml.utils.validators import ip_validator
label_desc: Use image node_id 1 for calling a global function with example usage: _start_app_server(ip, port) without return types