code: def wait_for_messages(queue, timeout, logger=None):
      wait_time = 0
      wait_step = 5
      timeout = int(timeout)
      if timeout == 0:
          return
  
      while not queue.has_next():
          if logger:
              logger.info(
                  "No messages found, sleeping for {} s (total wait time {} s)".format(
                      wait_step, wait_time
                  )
              )
          time.sleep(wait_step)
          wait_time += wait_step
          if timeout > 0 and timeout < wait_time:
              if logger:
                  logger.info(
                      "No jobs found in the queue during {} s".format(
                          timeout
                      )
                  )
              return
  
imports: import os
  import sys
  import subprocess
  import argparse
  import json
  import psutil
  import time
  import six
  import signal
  import pdb
  from apscheduler.schedulers.background import BackgroundScheduler
  from studio import fs_tracker, model
  from studio.util import logs
  from studio.queues.local_queue import LocalQueue
  from studio.util.gpu_util import get_available_gpus, get_gpu_mapping, get_gpus_summary
  from studio.artifacts.artifact import Artifact
  from studio.experiments.experiment import Experiment
  from studio.util.util import sixdecode, str2duration, retry, parse_verbosity, check_for_kb_interrupt
label_desc: Use image node_id 7 for calling a global function with example usage: wait_for_messages(queue, timeout, logger) without return types