docstr: Whether the client is connected
docstr_tok: ["Whether","the","client","is","connected"]
code: def is_open(self) -> str:
      """Whether the client is connected"""
      return not self._closed.is_set()
  
imports: from collections import defaultdict
  from dataclasses import asdict, dataclass
  import logging
  from retrying import retry
  from threading import Thread, Event
  import time
  import typing
  from bson import json_util
  import requests
  import sseclient
  from uuid import uuid4
  import fiftyone.constants
  import fiftyone.core.state
  from fiftyone.core.session.events import Event, EventType, ListenPayload, dict_factory
label_desc: Use image node_id 3 for calling the Client obj's underlying member method code with example usage: obj.is_open() and returns: unknown