code: def __init__(self, *args: Any, **kwargs: Any):
      super().__init__(*args, **kwargs)
  
      # Note: Track the open ports to close them on termination.
      self.ports = []
  
imports: import multiprocessing
  from typing import Any, List, Optional
  import lightning.app
  from lightning.app.core import constants
  from lightning.app.core.queues import QueuingSystem
  from lightning.app.runners.backends.backend import Backend, WorkManager
  from lightning.app.utilities.enum import WorkStageStatus
  from lightning.app.utilities.network import _check_service_url_is_ready, find_free_network_port
  from lightning.app.utilities.port import disable_port, enable_port
  from lightning.app.utilities.proxies import ProxyWorkRun, WorkRunner
label_desc: Use image node_id 1 to create a new CloudMultiProcessingBackend object from inherited base classes: MultiProcessingBackend with example: obj = CloudMultiProcessingBackend()