code: def add_session(self, session_uuid: str) -> None:
      s = session.get(session_uuid)
  
      if s:
          self.sessions[session_uuid] = s.key
  
      self.save()
  
imports: from typing import List, Dict, Union, Optional
  from labml_db import Model, Key, Index
  from .None import run
  from .None import session
  from ..logger import logger
label_desc: Use image node_id 9 for calling the Project obj's underlying member method code with example usage: obj.add_session(session_uuid) without return types