code: def __iter__(self):
      keys_list = list(self._jobs.keys())
      keys_list.sort(key=lambda k: int(self[k].job_key))
      return iter(keys_list)
  
imports: import io
  import sys
  from pathlib import Path
  from typing import Dict, Optional, List, Iterable
  import yaml
  from labml import logger
  from labml.logger import Text
  from labml_remote.configs import Configs
  from labml_remote.execute import UIMode
  from labml_remote.server import Server, SERVERS
label_desc: Use image node_id 2 for calling the JobCollection obj's underlying member method code with example usage: obj.__iter__() and returns: iter