code: def gen_uid(cls, session_id):
      return f"{session_id}_session_actor"
  
imports: import asyncio
  import functools
  import logging
  import os
  import time
  from typing import Dict, List, Optional
  from ....None import oscar
  from ....utils import to_binary
  from ...cluster import ClusterAPI
  from ...core import NodeRole, create_service_session, destroy_service_session
  from ..core import SessionInfo
label_desc: Use image node_id 2 for calling the SessionActor obj's underlying member method code with example usage: obj.gen_uid(cls, session_id) and returns: session_id, str